Nice engine indeed! And it's a Hong Kong MTR maintenance locomotive... Tomy made a lot of MTR trains, maybe this could be a nice addition to the fleet!
sadly not a lot of chinese people are aware of Tomy product line. it will be hard to make more MTR related trains.
They also have maintainence locomotive that runs on ATC (automatic traction control). Sadly due to technical difficulties on the line they are assigned on, they are mothballed until the ATC issues are resolved.