If it's the motor in these threads
https://endless-sphere.com/forums/search.php?keywords=TDCM+IGH&terms=all&author=&sc=1&sf=titleonly&sk=t&sd=d&sr=topics&st=0&ch=300&t=0&submit=Search
Grin Tech http://ebikes.ca has them as kits
http://www.ebikes.ca/shop/electric-bicycle-kits/tdcm-igh.html
or bare motors
http://www.ebikes.ca/shop/electric-bicycle-parts/motors.html
(multiple windings/speeds available so you have to look thru the list)