I thought the cheap Bosch relays all had the same pattern? Some of the hits I get suggest diodes are installed in the FP relay. I always carry spare FP & main relays in the glove box.
Are you sure the crank pos sensor is working? Test the resistance on that plug & see if it's 'round 650 ohms. If the CPS is bad it won't trigger the FP relay. You might have a good one there. Pelican sells those relays for like $15, don't they? Not listed on their site, but I'm sure they'd mail one if you called. BavAuto has them too, $8-$10 each.