Not in the best condition tbh but still holds air, been pressure tested and there are no leaks.
I believe it was made by Graham Goode Racing.
you can see the problem yourself in the pics below, the top row on the Near side is swelling up quite badly, didnt like nearly 2.5 bar boost, will probably be fine for lower boost applications.

£50 plus postage or collected from Northwich Cheshire, Not far from J19 of the M6 or the M56

obviously it is the silver one on the right.