Scale E60 - yes. I have a later shorty with the E-7 trucks - still sharp (and a splicing
is reasonable)...but, anyway. MTH offered and then cancelled the Premier E60 years
ago.
I still think that a $399 0-6-6-0 or even 0-4-4-0 at a level of detail and quality
of the recent Ten-Wheeler (but LOSE the cheesy bent main rod!) would appeal
to the toy guys and us Hi-Railers alike. Of course, they could be designed to be
offered at different times with/without leading/trailing trucks, different plastic tenders...
A dual-motor/RK-style design (essentially the same as a diesel truck/frame) might
put off some of the pickier Hi-Railers, but should be easier to build than the single
motor/driveshaft setup. I guess.