Congrats on the Cossie
Racetune is still about, I think he's in semi-retirement nowadays though and works from home. PM me if you'd like his number.
Theres a guy that advertises a few Cosworth bits on gumtree, no idea if he could help but may be worth a try even if its just for a chat.
https://www.gumtree.com.au/s-ad/lesm...up-/1304662636