You might also consider vintage razors, a lot of them are brass and they've stood the test of time to get this far.
Alternatively, if what you really want is machined stainless you can probably get it for that price from dscosmetic or yaqi on AliExpress. They have many models so it'd be worth searching out some reviews.
I often see people wedging injector blades into things eg. Ender's, Ronson, etc. but haven't given it enough thought to guess if there's a reasonable way to do that here.