If you can not find any you could get some Bennett 371 faces from Ron Scobie and modify them. All you would have to do is trim off a little at the bottom and add the holes to screw them on the computer. I bought these in the past thinking I could use them on a 371. They were not tall enough and the 371 faces do not screw directly to the computer so the screw holes would not need to be there. I ended up selling them.
According to my research of Parts Manuals for the 300 pumps, it appears that the face for you pump differs from the other 300 series pumps, but I agree to what Matt says above, you can probably notify the faces to work on your pump.
Jack Sim Spec 5, Army, Korea, retired (after 42 months)
Hey Jack thanks. Appreciate your service by way. I'm about to have 7yrs in on ARMY Engineer side, but looking to switch MOS soon since I'm in Pharmacy school studying to be a Pharracist.