I was wondering if the M3 Lee style suspension was mounted on M4 (not M4A1) Shermans. If so, can anyone post a picture?

Yes, of course it was. That was the initial VVS. Only later, did the Medium tanks have the trailing return roller arm VVS bogie unit.

http://the.shadock.free.fr/sherman_minutia/manufacturer/m4a1psc/m4_psc9.JPG

The centrally mounted return roller over the VVS bogie (i.e. the M3-type bogie) was on the M4A1, M4, M4A2 initially. The M4A3 and M4A4 pilot models had the trailing arm return roller.

Thanks