I also need new rear wishbone bushes, as my valver has a tendancy to wander a bit!
GSF do a set of new wishbones with bushes for £32 +VAT and P&P, I bought mine off ebay though, £17.50 each wishbone including bushes and bottom ball joint.
You can also buy a wishbone repair kit for about £10, this means you have to take your wishbones off get the old bushes out and get the new bushes pressed in - not worth the hassle IMO!
If you can fit them yourself then your laughing, you will need tracking and camber afterwards though!
One thing to watch for though is the captive nuts (that the wishbone bolts screw into) shearing off, you then have the hassle of lifting carpets in the footwells, cutting a hole in your floor!!!!

:shocked:and then welding the nut back on!!! then you also have to weld the floor back up!
hope this helps