you can buy the walbro pumps for like 99.00 each right off of ebay, and that is with free shipping. two walbro 255lph would do the job. i use them in all my mitsubishi turbo cars
watch who you buy them from on ebay though as there are quite a few guys selling walbro copies as walbro's and they break very soon...id spend the extra 20 bucks and get them from summit or another trusted vendor