of course it would depend on which products you had in mind. since you only gave TTP as the name of the company, i can only surmise that the p stands for performance, and you are looking for performance parts.
i would never get in anyone's way of making a living, but i stumbled across a website back when i was first gathering parts for the '87. it's
Speed Freaks Speedshop and my personal experience with them is that they always beat the competition's (Jeg's, Summit, CNC motorsports, etc) prices. they have a new section on the website for LS1/LT1 motors. i am not being compensated for hooking people up with them, it's just that when you've found a good thing you like to spread it around a little.
if you can't find what you need, send them an email. they don't have everything listed on the site, so bear that in mind.