Is this what you're after?
http://www.ebay.co.uk/itm/Team-Duran...item2ecf79a19e
I converted my RTR to midmotor, bought a 'kit' from eBay and it was fine. Only other thing I needed was a 20mm (may had been 25mm) cap head for the motor brace. Durango included most of the other stuff. I personally didnt think it was too bad having to spend about £10 on the idler gears/shims etc was that bad.