I think it'll suit your guitar fine, I was reading today that Tim had the Painkillers in his Feline Explorer at Music Live , so if they work in an Explorer they'll work in a V.
You shouldn't have any trouble installing it in your V, but I wouldn't recommend fitting your own cover because (a) the polepiece spacing may not match and (b) it won't be wax-potted, so it may squeal. If you buy an uncovered pickup and decide you want it covered, BKP will fit it for free and only charge the cost of the cover itself (although I guess you'd have to pay for shipping here and back again).
I don't know about cheapest, but the best place to buy is direct from Bare Knuckle!