Update:
So I learned the R33 GT-R ATTESA assembly is not a direct replacement, as the mounting brackets are different, however the pump and accumulator were able to be transferred over to the Stagea brackets.
After replacing the pump and accumulator with some used parts there were still some issues, and upon further investigation my mechanic found a couple clogged points in the line, which may have caused the old pump to wear prematurely. Car is still not 100% but we think its the accumulator so we are sourcing a new one from Nissan