You could just go to a restaurant supply site and order a stock pot. If you want it welded, just find someone who can TIG weld and make what you want. But, you still need a good step bit, a good drill and a steady hand. Then find someone to TIG weld the fitting. In the case of the 15 gallon pot at the link below, I think I would just order the Spike kettle. TIG welding is not cheap and if you don't have a step bit, you'll need to buy that and the coupler. It would cost me approx $164 with shipping to buy the 15gal 18/8 stockpot at this restaurant supply and then it needs a hole, fitting and welding. In this case the Spike kettle is a better deal.