You are in Tekno's back yard, you won't get better support than that.
You can find rollers on rctech here and there, some artr's too. New kit tekno or durango will not be cheap as you have to buy all of the electronics separately. Hunt the FS threads for a deal, the tekno is just about bullet proof so even a used roller will more than likely still be tight.
Here, it won't last long
No way a new in box ofna will compare to the quality your getting with this
http://www.rctech.net/forum/r-c-item...rtr-fs-ft.html