CDL or BYD is a good choice. There's a brand new KO4 turbo for sale on here as well, so a couple of options.
Have you compression tested your BWA? 120K is nothing if it's been looked after. Mine's on that and still showing 14 bar across all the cylinders. If yours is really low, chewing oil, kicking out blue smoke and sounds like a box of bolts rolling down a flight of concrete steps......then yeah.....bin it off for a KO4 engine!