Ernie - Walthers offered them...about a half century ago! About the same time, Pittman had their "Bride & Groom" set; powered and trailer heavyweights based on the John English HO die cast 60' coaches. I do seem to recall perhaps Bachmann also issuing some heavyweight electrified cars of this type for a briefly period maybe 15-20 years ago, but those are the only three HO examples that come to mind.
Although, not powered, the ConCor MP54 coaches are pretty nice. There are rumors of a powered version to be released some day. Perhaps you could rig your own mechanism...or kitbash the chassis of a proto 1000 rdc, or doodlebug.
