The only dealer in Milford (they actually moved to Highland North of Milford) is Jay Chevrolet. I can't remeber what it was before Jay but it's changed hands a number of times since the move to Highland. I also looked it up in the NCRS web site and found what is below. Good luck with your search.
Dealer Zone Codes
Zone 44 Dealer 500 Status: Still in Business
Dealer Name van camp chevy inc.
Address: 2675 n.milford rd.
City: milford mich.
435hp. conv. vin 1194679s730244 alum. cyl. heads
Zone 44 Dealer 500 Status: Unknown
Dealer Name Van Camp Chevrolet
Address: 2675 North Milford Rd.
This dealer delivered a 1969 L-89 Convertible, Riverside Gold on Saddle w/ side exhaust---ser# 30244.