I bought a couple of these little torches for about $30 each on eBay. They don’t come with regulators but the fittings worked on the small torch that I already have.
I used it for a small silver soldering job and it worked well!
It heated the parts enough to solder them together but did not make them glowing red like my other torch would have.
I wish that the tips had numbers on them because my old eyes can hardly see the holes because they are so small!