I would go to the local welding supply (LWS) and see what they can do for you. The problem with those tanks is that they are small, and the LWS might not touch them. My LWS will allow you to trade in your tanks for a bigger size for the price difference. My LWS is also pretty reasonable on their prices in comparison to Cyberweld or other internet brands. The advantage is they will fix the stuff they sell you if it has a problem.

They really wanted to sell me a Victor J100, which really is a little too big for framebuilding. On the other hand, you can always get a smaller torch later and use the regulators.