Wagon owners can you help me with third seat?

[CDN]

Hi all - I am putting out a cry for help to get the third seat installed in my new (1985) 300TD. It has become a huge frustration. Those of you who pay attention to such things will know that I lurk here a lot but don't post often. I bought the car a couple of months ago and have been meaning to post a thank you to all on this forum whose input was so helpful in the process of looking/deciding/buying, but I thought I would wait until I could post a pic of the car, complete with third seat; unfortunately it is beginning to look like that is never going to happen.

The story so far... knew I wanted another wagon, need the 3rd seat for my 5 kids, their buddies and their dog but was having a hard time finding a good wagon with the seat. Posted here and learned that it is feasible to install the seat into a wagon without one, so when this car came up I snapped it up (it is a beauty) even though it didn't have the seat. Thanks to the generosity of a fellow forum member, I was able to get a rear seat for it, but I didn't know until it arrived that it came without the hardware to install it.

I have been trying for almost 3 months now without success to get what I need to make this useable. I have tried Phil, of course (dealer only part was his message), every MB place I can think of or that has been posted here from Potomac German in FLorida to TriStar Pete in Arizona and as many places in between as I can think of. PGA said they had the hardware, took my credit card #, it never showed up. Two weeks later a sheepish reply to my phone call that they didn't have it after all.

Finally I thought okay, dealership it is, no matter what the cost. Was told it would take 10 - 14 days. That was 5 weeks ago. Phone calls in between assured me it was just on back order until today, when they said MB will no longer supply the hardware installation kit. I am so frustrated at having wasted over another month and being no closer to getting this seat in. So my hope is that one of you will have a suggestion as to where else I could look for this (the MB Dealer's suggestion was to get the yellow pages and look under salvage yards - very helpful)or even better yet have a wagon with a seat that's not being used

At this point I don't care if I can get the whole original installation or not, I just need it to be safe and useable, which means bolted in,seat belts and the clip that holds the seat in place while you're using it (rather than folding down and squashing the little kiddies flat every time you brake I guess)Since I will be using it almost all the time that I am in the car, I can live without the sliders etc that usually come with it, I just need to be able to bolt it in place and for the odd time that I will need to move it up and down it is manageable. If not I guess my next option is an aftermarket seat, but it seems a shame when I already have the original seat (not to mention they are pricey).I did try the aftermarket guys for hardware, but they won't sell it separately. So if anybody has any bright ideas I would sure love to hear from you. Sorry about the long post - needed to get that off my chest I guess - good things don't always come easy I keep reminding myself. Thanks for any help you can give.

edited - little easier to read I hope