Perry,
Re. your question "how many Fisher built tanks are still around, as monuments or runners", please refer to the following links:
Fisher-built M4A2's:
https://usautoindustryworldwartwo.co...tankphotos.htm
Fisher built M4A3's:
https://usautoindustryworldwartwo.co...tankphotos.htm
Surviving M4A2's:
http://the.shadock.free.fr/Surviving_M4A2_Shermans.pdf
Let me know if this is of any help, else I will look for further info.
Regards,
Hanno