Don't fear ordering from Japan, works better than you think as long as you are patient, and hope that shipping prices return to pre-pandemic levels. Looks like they are already coming back down.
I had split gear fails on mine to the point the wheels actually fell off, and repowering with a stretched Tomytec mechanism worked wonders. Very happy with the results.
Mine was definitely a first generation mechanism of the Doodlebug, and even when it was new, it was a very poor performer - shelf queen.