The Reynard FF83 that I used in Mono at the end of the 90s is for sale on Race Cars Direct. It's been raced by its current owner John Stewart for some time (he's based in Ireland, but has raced it very successfully there and in NW FF1600)). He bought it off Dave Hart, who I sold it to.
In Mono 1600 trim this was a stonkingly quick car...eg 47.1 round Mallory.
If I was allowed to race in Mono I would certainly be buying it myself...
Sigh
Simon