Start watching the paper, local "Buy and Sell" type things. Down here we have one called the TRIAD. Needed an engine in a hurry a few weeks ago,na dnone of the wreckers could supply one . Bought the triad, found a whole car, price was right. Wanted a 1.9, found a 1.6 TD car that's a mate to the two I/we drive. Was in a hurry (daily driver) so took the first decent diesel I could find. Good luck!
BTW, could be an audi fox, I've seen a few up here, but the vdubs are a lot more common. Just got rid of one last weekend.............