How many RWKW are you aiming for in your car?
If it is anything upto 280rwkw i would recommend going down the Walbro road, but make sure you buy from a reputable dealer.
If you are set on going the bosch out north i would say Boost Worx and out south i would go to Southern hitech.
There may be some people on here who may volunteer to do it for you also.
You are probably looking around the $100 mark as you have to modify the craddle and if done correctly they will double earth the pump.