You can get stainless tubing and compression (Yor-Lok) fittings from McMaster-Carr at
www.mcmastercarr.com. Not cheap but looks nice. I am in the process of finishing my 261 rebuild with dual Holly/Webers, Fentons and Offy and am using all SST for the fuel, vac and heat plate lines. I have some pics on here under the engine rebuild album.
http://community.webshots.com/user/geezer