Left Coast Paintball.
Bought a 5x rebuild kit from FLASC Paintball's ebay shop - or from their site:
http://www.flascpaintball.com/flasc-paintball-o-rings-lube/marker-o-rings/bob-long/flasc-paintball-g6r-o-ring-rebuild-kit/ or their ebay listing:
http://www.ebay.co.uk/itm/380525613355
Works out if done via eBay about £11 shipped, if that.
(This is to go with the oring kit I got with the marker so I have enough spares to last forever!)
Grips are $20 or $25 (in the email from LCP, he mentioned 2 different prices!)
Feedneck is $40
Gaskets are $3 each
Players Parts Kit is $35 (orings, screws, detents etc)
Pillow Tips - $free
Shipping is $25 though :/ But I'll probably tag my order on to someone elses who is ordering soon