(...) I also need something that is of a similar size to the that is it has to be rather compact. (...)
What's the maximum size, that would work for you? If somewhat bigger, but still deeper than than wide, would be no problem, a Yamaha AX-10 might be an idea.
The AX-10 doesn't feature classic tape monitoring, though, 'cause its pre-amp section is a true record-selector design - which means, that integration of recorders with confidence monitoring as well as EQs/processors/filters/whatever via its tape-loops as such would work just the same, but usage would be different, as rather than choosing the source signal, that should go to the recorder or EQ/processor/filter/whatever, via the main source selector and using the tape monitor switch to choose, whether you'd want to to listen directly to the selected source or to what's delivered (back) into (one of) the tape input(s), you'd instead use the record selector to choose, which source input signal goes out to the recorder or EQ/processor/filter/whatever, and the main source selector to choose, which input signal you'd like to listen to. The AX-10 additionally also sports a classic pre-ount/main-in loop, though.
Whereas in case the AX-10 would be to big for you, another idea could be one of Aiwa's older mini component system integrated amps (SA-A10/-A22/-A25/-A30/-A60 & S-A35). Iirc, all of these sported classic tape monitoring
Greetings from Munich!
Manfred / lini