I'd been using Bargain Fittings
https://www.bargainfittings.com/index.php?route=common/home for a while now and a quick comparison of just a few fittings shows their pricing to be a bit lower than BrewHardware BUT... BrewHardware looks to have quite a bit more than just fittings, and their tubing comes in a bit lower than Bargain Fittings.
Bargain Fittings claims their silicone tubing has FDA approval and NSF 51 Certification, and BrewHardware claims FDA approval so either one should be plenty safe for direct food contact and both claim they can go up to 500 F. Looks like these are two good choices for quality silicone tubing.