1974 W115 240D Auto transmission leaks

[DESI4x4]

Dear All, Finally my W115 is running and goes well with a small problem. My transmission leaks from the three covers that are on the side of the transmission. I opened and checked and they have large o rings, which are leaking. So my questions are:

1. What are the part numbers for those 3 o rings? and where can i get them? Can't seem to find any at this website, and also from Autohauz.

2. The dip stick tube also leaks from the banjo bolt and I have tried copper washers and aluminum washers to no result. I am afraid to tighten it any more... Any suggestions?

Thanks Again for helping me with my previous problems. If this is fixed I can finally get a plate for it and drive it!