Some stuff on etsy: actually looks close.

https://www.etsy.com/market/french_drawer_pulls

A little cost and effort, but you can make your own copy if it's important enough to you. There are a couple companies (here's one) that will sell you supplies to make a mold from an existing piece to re-cast a near-perfect reproduction. It's actually a lot of fun to do. You can make molds for true metal castings, but the urethane resin they sell is pretty tough stuff (probably stronger than the pot metal in the original), I'd be tempted to make it in urethane, with or without metal powder, and then put the repro pull in a location where it doesn't get used much. Once you have the mold making lots of copies is easy.

Take it to a welding shop. If they can fix it, that will be better.

First place I'd look is http://www.vandykes.com/