Am looking for a propane burner for a vermont castings radiance 2600- you can't get the conversion kit from natural to propane- what can I do to get this to run on propane?

Unfortunately, as you discovered, there are no gas conversion for your Vent-free gas log stove. There are none available for any Vent-free supplemental gas heating product. And despite what others may tell you, there's more to the conversion, than just changing the pilot orifice. By the time you bought all the parts to safely do it, it wold have cost you more than you would want to spend. The bottom line is, it can not be done safely. And any attempts to convert and operate it, puts all the liability on you if something where to go wrong.

I wish I had better news for you. But, it's always best to err on the side of caution and safety, when dealing with gas fired products.

Thanks for choosing FixYa.