I've just confirmed through a really old post by stevebfl that the pump is indeed the same across so many models. Simply amazing.

Here's the link: http://www.peachparts.com/shopforum/showthread.php?t=66381

Thanks again to Sixto for pointing me to the right part number which allowed me to Google and find the confirmation.

I can rest now. I'll begin the hunt for the SLS pump / pressurized oil pump later today.