anybody know if this backplate plus block when i find one http://www.overclockers.co.uk/showproduct.php?prodid=WC-021-OE&groupid=962&catid=1534&subcat= will fit this card?

yeah, its annoying, why can't they just have 1 pcb for all the cards
The 9800gtx+ have 3 different ones i had two different ones my self wanted to put them on water so emailed ek and they didn't make a block for either. Was well fished off
Guessing I'm not allowed to say this but I'm selling a 5870v2 Waterblock + v2 backplate cheap if your interested. =]
Also your picture is a 5830.