Many thanks to those who responded.
The DCC Concepts do look exceedingly good, but I'm still baulking at the price.
The Gaugemaster GM813, does not quite look the part (judging from the catalogue photos), but I had more in mind the GM856 which looks less squat and are half the price of the DCC Concepts model.
I also had Mikes Models in mind, but that was dredged up from my long ago memory bank. It looks like they went out of business some time ago - they were a one man band set up.
So, I' ll invest in a pack of GM856.
Thanks for all the help