Tbh I remember those coming out and no offence they never looked anything more than a aftermarket dealer special whereas were it given a proper engine the racing puma would,IMO have become possibly the best car of it's era,great looks,exceptional handling and rarity.
New costs mean nothing,there's £50000 audi's out there newer than yours now only worth £800.
TBH you'll get paid out what it's worth,substantially more than a standard focus of course but not focus Rs money,to me £3800 is strong and unless that's agreed value Brentacre's underwriters won't be giving you anything near that,theyll see it as I did,nothing more than a dealer special 12 year old focus.

Like I said,sorry if it sounds derogatory as I can see you've cared for the car and it's far better than anything I'm driving right now,just trying to be realistic.