Hi!
Damn once again.. still can't stop looking at your car.. It's soo nice... I've only seen a few nice 114/5's on the road in Boston. There was a beautiful 220Diesel the other day and a 250C coupe. They look very very Mercedes.
If only you were closer I really would love to ride in these older cars... why are there no enthusiasts from Boston?
About the shift boot.
Paste this number in Fastlane's search engine
J1075-51146
I looked under '76 240D -> Transmission -> Shifter Boot
Personally as much as I crave for originality I would probably go to an upholstery shop and have them make me one from real leather.
That's me though...
Besides leather doesn't really look out of place on a Benz!
The door pockets... I would get them from the dealer. That's how I got some of my plastic interior parts. Took them a month or so as they told me they had to ask around the dealers in Europe!
My friends were surprised that they could get me such small little parts for my 'old' (i know it's nothing compared to the 115) car.
Alternatively look around junkyards and e-bay especially. Post a request in the parts forum!