Really nice job there! And nice seeing something a little different.
Vision Models does make a nice set of aftermarket tracks for this kit or anything based on a Type 97 chassis (about 75% of Japanese tank models out there). I picked mine up for about seventeen bucks US. They're plastic, one part per link, and snap together. They advertise them as being 'workable' but I find you can snap them together the way you want them and then hit them with a little liquid cement and be done.