Quick ebay seach for 'powerflex omega' brings plenty to choose from as here:
http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XPowerflex+Omega.TRS0&_nkw=Powerflex+Omega&_sacat=0Don't bother buying a set that includes the anti-roll bar bushes - beyond pointless, waste of your hard-earned.

Genuine Vx ball joints retail at something horriffic like £50 each - though they are the best & longest-lasting, but they can be found for a lot less if you hunt around. I'll see if I can get you a price if you wish, be about £40 the pair, maybe less. The usual QH and other known makes are of course fine, too.
I was lucky, in that I cannibalised my polys from my previous car, so they were 'free'.
Front bush was direct from Vx Dealer - hope they're still available, but they were a fair bit (but again, the best ones) £36 the pair I paid.
My wishbones are 'no name' ones, which some say do, some say don't use. Two years and no deaths yet

The bushes went in with a 10 ton press a mate did for me at work, ball joint and polys went in like a piece of wee-wee.
I made myself Genuine GM 'OEM+' wishbones all-in for about £58 each I think all-in... retail being about £190.
