I just installed a [fuel pump] and it's really noisy! Is there a fix?

No. Aftermarket pumps are almost always louder than the stock pump - it is one of the prices you pay for getting the increased pump performance. The Walboro upgrade pumps are notorious for this 'problem', while ND and the Supra fuel pump are reportedly a little quieter (but more expensive). Adding soundproofing to the rear of the car should help. 

Deatschwerks fuel pumps are turbine based and are reported to be much quieter and are E85 compatible.