Narrow Gauge Diesel

So consdering we now have a main stream narrow gauge route in Clear Creek any chance someone could make a narrow gauge diesel engine. I'd say like a Plymouth or maybe even a GE tonner engine though the GE's might not fit time period depending on what type it is I would think it pretty cool to have a switching engine for narrow gauge to do like work of assembling trains and what not. Could also be good for the DSNG route that G-TRAX made a while back. Attached are images of a 25 ton and 50 ton GE engine at the Pinecreek Railroad in Nj




