I once purchased a Yamaha R1 not knowing it was a cat B.

I had repaired the vehicle and applied for the book, soon to get a shock from dvla stating they would not issue a logbook with original reg num.

Contacted my local dvla and they asked to see the bike, and after 2 days I had a new reg and book and not recorded as ever being damaged.

So there is a possility, but if they know that you was the one asked by the insurance to dismantal the vehicle for spares I doupt they would issue one to you.