Last week I bought a set of Richmond gears from Performance Plus Distributors in Saskatoon. Depending on the ratio you want, the price and brand will vary. 3.55 / 3.73 / & 4.10 ratios are around $260 and are Ford Motorsport brand.. 4.30 and 4.56 ratios are a little more $299 and are Richmond gears.
I see you have a 95' stang, if its a auto I'd go with 4.10's..... If its a 5 speed 3.73's are great, but for the few hundred more RPM i'd still stay with the 4.10's...
I got my 3.55's out of an mid 80's F-150 out at Buck's.I think they cost me around $60 but I was able to offset that by selling the 31 spline truck axles to another guy.
In stock? I ordered mine on a monday and recieved them here in Regina on wednesday. So I don't know. It was quick enough for me, they must stock them..