What I will say is if 2 manufacturers are making 3 wheelers surely one will make one of these (albiet mine is a frankenstein and a pain to look at for too long, it took like 2 minutes to make anyway!)
Hattons have already announced what three wheelers will be in there 3rd round....maybe if there is a forth round or god knows hornby announce this Im sure people would want to have one on the layout or weathered in a siding. And mean coaching stock is abailble for steam locos and C Class locos if any were to be produced in the future....