Ruger P-89, P-90, P-91 Compatability

I have the opportunity to buy all the parts of a Ruger P-91 Decocker pistol except the frame. I am wondering if the frame from a P-89 or P-90 would be able to be used. For any that dont know the P-91 is a discontinued model that visually looks identical to the P-89 (9mm) and the P-90 (.45) but the P-91 shoots .40 cal. Thanks in advance.