Mate thats not a bad price, but have tried GSF, ECP, Heritage, GPC vw auto parts, TBH any breaker yards should see at least one MK2 with its pump still in the sump!
BUT BEFORE YOU BUY ONE HAVE YOU CHECKED THE OIL PRESSURE FROM THE OIL FILTER OR HEAD?
I'm saying that you can check the oil pressure and compare it with others on here to establish if you do have a oil pressure failure. Unless you get some sort of VDO gauge or even borrow a oil pressure tester it might save some pennys, but either way you need to take the whole thing out and clean it up.