yer, 200 built 74 or 75 were RHD... I agree there are more Big turbo examles about than small, that is why they were produced, to deplete the Big Turbo shells AFAIK...
I know of a nice genuine Mallard example which will be available later this year, well in a couple of months
https://passionford.com/forum/viewtopic.php?t=45301