I had them in my toolbox, looks like what I used was SBS9.5 & SBO7.2
I know one was for the drive and the other for the counter, but don't remember which each was. I also bough a SBS10.0 just in case, but the 9.5 worked great. Got mine from Studio Sound, not sure if the part numbers are different at different places.
Any questions just let me know.