Both Roundhouse and Accucraft modelled the Sandy River Forney-style loco, but that was around fifteen years back. They were deemed to be somewhat wacky-looking by the UK audience, and slow to sell. I've seen one Accucraft version in the last fifteen years, and that was £1500 then. At that time the CAN$ was around $1.70 to the £, so not cheap.
Accucraft made a version of their beginner loco, 'Ruby', as a Forney, but that, too, is rare. If you give Jason a call at
Roundhouse Classic Series