Hi Brando92.
Having a similar problem myself.
Falken tyres do a ze912 tyre.
Its available in a 185x60x13 and a 205x60x13.
There is also a smaller width available.
A few of the UK guys use the 185 tyres for their cars. (As per the retro ford and classic ford mags).
I will probably get the 185 for the fronts and 205 for the rears.
Tyrepower stock them and the 185 were about $155 from my local one, but I have yet to shop around.
So it would be around $620. A quick currency conversion on the others were about $730 (if importing from UK).
I have not used these tyres yet but the tyre is a popular choice on some of the cars featured in the mags over there.
Cheers Steve.