It's speculation, but I'd assume the front display module from most SMIQ (and probably SMT and SME) units would do. There is some cpu upgrade option that I think all SMIQs (maybe just the ones with the newer style back panel?) had that you may want to add back into the display/front panel module you find, but I assume it's matched parts.
The service manuals may have some specifics on the variants that show your the modules, that may be the best confirmation. I assume the ATE versions still have the CPU board (something's gotta control it) that resides in the back of the display module, but normally that whole front panel section including controls and screen is its own subassembly, at least if I remember correctly.