I splurged last year on a Victor Journeyman 2 kit for my first oxyacetylene setup and have not regretted it - especially since my other braze repairs have been larger and I have had some uses for a cutting torch as well as the rosebud as well. I have some flux-coated brazing rod I got from the local welding supply shop, but it is too big for this (1/8" diameter I think).

I have a pack of smaller/thinner brazing rods, I think they might be Bernomatic WB5 https://www.bernzomatic.com/Products/Brazing-Welding-Rods/WB5

This small brazing job could have been done with a MAP torch too, but I happened to have my OA setup in the garage. I might try the next small brazing repair (like if another trowel breaks) with MAP just because.