That's terrible! This article, and the comments below it, may be helpful:    

Trader Joe's carries a good variety of affordable gluten-free foods like bagels, hamburger buns, pasta, etc. I like Franz Gluten Free bread, which is available at my local Costco. Food For Life and Little Northern Bakehouse (advertisers here) also make excellent gluten-free breads. Costco also sells gluten-free pizzas, crackers, gravy, etc.

No, Life Extension contains Benfotiamine and Thiamine Hydrochloride. Objective Nutrients Thiamax contains TTFD.     I take both of these and a B Complex.  

what Benfotiamine should I take as Life Extension contains both Ben and TTFD.

I take both Benfotiamine and TTFD.   You might want to start with the Benfotiamine for a few days and then add in the TTFD.   You can look for NeuroMag (Magnesium Threonate).  A magnesium glycinate is fine, too.  Doctor's Best is a good brand.  Don't take more than 300mg total per day of magnesium or it may have a laxative effect.   Be sure to take the B Complex.  The Benfotiamine and TTFD will need the other B vitamins.