Bad luck-- Massdrop usually bundles the compatible version of Gateron Yellows when they drop the TeamWolf swappable switch boards...but, the current iteration of the drop is only for the TKL version (yes I know, it's not
exactly pre-built, but close enough; there's no soldering or anything).
I believe PLUM makes, or is about to make, or is at least thinking of making (it's hard to tell sometimes with these foreign ads), a full-size keyboard with Gateron Yellows, but you may have to go through a less traditional channel (AliExpress or even TaoBao), and it'll probably be a bit over your budget.
Not sure what will happen if you go
here, select full-size (108), and Gateron yellow, but maybe it'll work?