For anyone familiar with Thumanns hotdogs, I have found a market in central CT that carries them. I learned of this hotdog from the roadfood.com website but have never been able to find it. It's always rated as one of the best.
As far as CT dogs go I always preferred Mucke's, Hummel and Kayem. Thumanns tops them both in my opinion. Gotta get the ones with the natural casings. Thumanns deli meats are comparable to Boars Head and arguably better.
If you've been looking for them, you can get them at a place called Meriden Supermaket on Hall Ave in Meriden, CT. He sometimes has them in the case but you would be safest to call and order them first. Great market for deli items and meats.