Here is a link to the "Boscombe Down Incident"
RAF Boscombe Down's Black Day
I think we may be confusing two aircraft -:
1) SR-71 - Aurora -
Replacement aircraft High and Fast
2) TR-3 (?) Tac. recon. aircraft possibly developed from YF-23 which was more stealthy than F-22 but more expensive too.
Weren't some of the F-117 guys in the gulf seen wearing team stealth patches with two aircraft silhouettes ?
Aurora was probably unsuccessful long term, the examination of funding shows something very expensive in the right time frame, lets not forget the SR71 looked at a lot of places not just USSR.
Be lucky
David