Most of the suits I sell to tall thin people like yourself are the Alpinestars and OMP.

The other route is to get a suit that fits your torso length ( roughly the shoulder to crotch distance), arm length and leg length and then bring it to a tailor to be brought in. A number of places sell the nomex thread so you could bring the suit and thread to a local tailor. Also there are a few larger places that work on suit customizations that could do it too.