Vollmer's was in my neck of the woods.
Around 1995-1996 they still had a row of a few SP89 stretch builds on the bottow row of the case when you walked in the door along with a few other build goodies... I would assume they were still actively building at that point or maybe were winding down. Correct me if I'm wrong, but didn't Fred have some kind of infraction/no-no that kind of segued into his retirement?
ETA: Found it...dated 1996
Around 1999 or so, there was no formal storefront in Bloomington but still dealt with preban exotics (FAL, HK, Steyr, etc.) They were no longer building at that point. It wasn't a few years later that they stopped dealing guns and were dealing in safes only and that was short-lived as well and Rob moved the business up to Plainfield, IL where he eventually closed shop.