2005 7.3l Parts in Canada

Hello. I have recently taken over as head tech for a local touring and adventure company here in Vancouver BC that has 3, 2003 f-550 7.3l in their fleet. One has a leaking HPOP. I contacted the dealer and they want over $1000 for the pump! I know there has to be suppliers of aftermarket parts out there with reasonable pricing! Can anyone recommend anyone to me? Thanks

Dwight