I'd say it's post 1991 as the original decals on my Cougar didn't have the head tube logo like that or a stamped fork crown.
Got a micro low pro built as well around 94/95 & this frame had the Cougar head logo.
Not sure if they got anywhere, but the last time somebody queried their Cougar, I suggested getting in contact with the man himself via his new company. When I went to Merseyside to get my second frame, I met the man himself and he was very proud of his order books so I guess if he's still got them, your frame will be recorded in there.