skyline gts power steering pump, where?

i need to change my power steering pump but where is the best place to buy it and how much could it possibly cost?

is it hard to install?

is there someone that want to do it?(paid)

thanks

i may need to change my power steering pump cuz there's some faint rattling/knocking coming from maybe the ps bearing... nothing serious but it annoys the **** outta me

anyways, i started looking around the engine bay and did some research and it seems like i may be in over my head... apparently the ps pulley is a bitch to take off and may need a puller or a bfh.

if i end up doing it i'll probably just bring it to camo since they know wut they're doing... or any other place that won't mind working on my car... my old garage won't touch my car if it's engine related lol