NarrowGaugeCreations@Thedragonbuilder I've considered making steel narrow gauge passenger cars of Mexican prototype - there is a steel car running on the Georgetown Loop Railroad that is an ex-Mexico car. There is another designer on here who has made numerous ET&WNC cars - and they look awesome. I do have a ten-wheeler frame I am working on. It needs a few modifications, but once I get those bugs worked out I may offer that for sale. There are drivers available from the UK that would work with some modification, or drivers from a Bachmann standard gauge 0-6-0T that would work with new narrow gauge axles.
NarrowGaugeCreations@Thedragonbuilder I don't see why not, but I have never used link and pin couplers. I designed it for a Kadee hon3 coupler box, but it's just a flat area that any kind of coupler box can be screwed to.