I need some seat rails that fit the following criteria:

1) Made for side-mount seats (Sparco, etc)

2) Are adjustable

3) Don't sit you higher than stock (helmet hits the headliner)

4) Are quality mounts.

Need this for a '91 hatchback.

I know Sparco made some a while back, but after the sliders are added, they are as high or higher than OEM. Honestly, I have not checked what is on the market for this application for 5-6 years now.

 

Might as well ask for a unicorn while you're at it.

Unfortunately, I do not think that anything is available that would fit your entire list there.

I had Wicked Innovations mock up and make me a side mount for my Momo, but it is not adjustable front to back (though the Momo side brackets are, which is some consolation), and it does raise the seating a bit, though better than the awful setup I had before.

Keep looking, though - maybe someone does make something, but I haven't seen it.