I would avoid an 11 speed front derailleur as the cage width will probably be too narrow, leading to the chain scraping against it in certain gears.
FDs have improved over the years, but most 10 speed models are as well made as 11speed.
I’m assuming you’ve got a 10 speed chain, so stick to a 10 speed FD.
I managed to get a used SRAM XX FD for peanuts on eBay last year. It provides excellent changes with my 42/28 SRAM chainset. I’d recommend finding either an XX, X0 or X9 – you might still find them in bottom-pull flavour.
While you’re at it, get a cheap SRAM 2 x 10 front shifter. Even an X7 will be good enough, and cost very little. Get rid of the old XT 😉