Pick-n-pull by I-30 and loop 12 has a w108, but it's a 6 cyl.
There is a yard close to my house, by I-30 and Riverside Drive that has 2 r107s and a w116 that have D-jet, that's where I would go to get a distributor. I already took the D-jet point sets out of two of them.

I think it's called AB's.

Csaba