If Court's recommendation doesn't work out, you could go with an external pump and regulator.
For an inexpensive external pump, go to NAPA and buy this:
2P74028. You can buy fittings for the pressure side from Earls, Summit racing, ect. It has a 3/8-24 thread, which is AN #3.
Use an external fuel pressure regulator like Aeromotive 13301. The Mallory regulator are a little cheaper but I have had problems with them leaking. The return is in the bottom of the regulator, route it back into your fuel cell.
This is exacly how we set up Chris Blais' RZR with an inexpensive fuel cell.