SS preamps with two XLR inputs and at least four outputs [two of them XLR]

The OP is looking for "at least four outputs". I personally haven’t seen any preamps, maybe except for home theatre processors, that meets that requirement. I think most of models recommended don’t either.
Using splitters is an option. Or check the miniDSP thread.

“The Mac C47 does meet the criteria, however it is out of my price range”

Actually, if you look at the C47 carefully, it looks like the two pairs of the XLR outputs are shared with the two pairs of the RCA unbalanced outputs which seems to imply that you can only use one or the other and not both at the same time. So technically it has three outputs one of which is “fixed” similar to a “tape out” loop connection. If you need four independent outputs all of which controlled by the volume control, then you’ll need to look further.