You must be logged in and verified to contact the designer.
This updated version of the coaches uses the "Pin Point wheelsets" found on Tgauge.com which can be found under the spare parts page.
http://www.tgauge.com/product/253/7/2-pin-point-wheelsets - 2 wheels
http://www.tgauge.com/product/254/7/20-pin-point-wheelsets - 20 wheels
http://www.tgauge.com/product/255/7/100-pin-point-wheelsets - 100 Wheels