Before throwing the Quickfire torch away, you may want to convert it to accept a regular threaded MAP cylinder. Here is how I did mine.
First buy an inexpensive "Universal Torch Extension Hose", about $21 at Amazon. I got mine at local Homedepot for $15. Then modify the threaded male-end connector to accept the Quickfire quick-connect fitting. A bench grinder could come handy for this DIY. It is a one shot modification of the extension connector head, so be patient and work slowly. It does need near precision grinding and filing for exact and proper fitment.
Please do this DIY at your OWN RISK, I'm not responsible to "ANYTHING" that might happen from following this DIY project.
Berrnzomatic Quickfire with their proprietary quick-connect MAP fuel cylinder head.