Can't answer that question, and I'm a ways away (next life maybe) from 1" tape, but 24 and 1" seems an interesting compromise, not as narrow as 16 on 1/2" but not as wide as 16 on 1" those MSR-24 (and I think Fostex made a similar deck) have always appealed to me for their compactness, as opposed to the footprint of say the MS-16.
I'd guess the electronics are similar to the MSR-16? I'd think in theory this should be possible. Perhaps you could make a hybrid 1" MSR-16 (some electronics) with the MSR-24 transport and the MS-16 head stack????? Again, I'd assume that there was some similarity in the chassis from a production standpoint. If I had spare time/cash/room/time/cash/time They look a lot alike and both fit in 19" racks.... The MS-16 is a three head machine, the MSR-24 AFAIK 2 head, not sure if that matters the MS-16 heads say REC and PLAY, but it's the same part number on openreel.net...
Or then again, just re-wire for the 16 track head? I'm kinda talking out of my league here... but I do know places like JRF and ATR do wide track conversions, like 1/2" two track from 1/4" machines so this doesn't sound that unrealistic.