Meridian Motorsport have Velo and Sparco, Revoloution racegear have cobra, omp have racetech. these are the three brands i would look at. I had a Velo Podium 2 and it was awesome, i now have a racetech and somewhat wish i still had the Velo but its still good.
It is definantly a worth while purchase. stay away from all the Drift/autotechnica crap. High sides and low mounts are the key, especially in silvias/180s. i managed to make the velo fit into a bride superlow rail.. it takes a bit of convincing.