I'm also making my own. I got the SS head in a trade which I'll be reworking (not much I don't think... maybe the mouth... possibly the hair and definitly the neck and chin, not that it's wrong, I just want it... better.
I'm using the Saturday Toys Biker set which comes with a grey t shirt. The Jacket isnt perfect accurate, but you know what? on a suitable body? It looks like Arnie as the Terminator.
not many people could tell you what jacket he wore exactly, they'd just say a black leather bikers jacket. So this will look good enough.
I can't remember what body I bought, but it was a better match for Arnie's physique in that film than the SS or most of the other bodies out there (all too muscly... and he wasnt in that film)
I'll find out for later though I guess
This hasn't been messed with too much, I just put it together to see how it would look once I'd done the head. Gives you an idea though.
If you're after a good ref pic of the jacket though......