Yes, replacing the original panels with new front, back (mostly for cosmetic match), and I/O panels would do it if you wanted to go whole hog. There would be tons of interior and panel space for an added built-in reverb and PP monitor speaker(s) and digital amp and all the extra knobs associated with those. The pitch arm would probably need a multi-pin connector for the active AFE , but I've done something like that before.
Otherwise a more retrofit approach could just replace those same panels without adding any additional electronics beyond the D-Lev basics. It would also be an interesting functional and playing test to see if you could possibly get away with driving the whole pitch arm and antenna as a a single conductor to avoid moving the AFE out into the arm. Keeping most of the conductor surface area in the rod itself could minimize the distortion of the pitch field due to the section of horizontal feed wire. I would try it, even if it goes against the norm.
I don't know if Moog (or whatever they are becoming now) is really going to abandon the Claravox, but if anyone ever ends up frustrated with a dead and non-repairable Cvox, save the cabinet! I'd like to try this too.