I bought a used T Maxx off of ebay years back which turned out to be half Smartech. The chassis plate, chassis braces and bulk heads were Smartech with T Maxx suspension components.. I don't know what mods if any, were made to make it work.
I wouldn't give up on it. You got it dirt cheap, looks complete and in good condition and there appears to be a decent parts assortment available on ebay U.K.
If you're new to nitro rc you have a perfect platform to experiment and tinker with, then upgrade to something eventually if you choose...
Welcome David. Double check your truck to these pics. http://www.hobbytron.com/SmartechMagicWheel184WDRTRNitroOffRoadRCTruck.html#
http://www.ebay.com/itm/Smartech-Magic-Wheel-1-8th-Scale-4WD-Nitro-Powered-Monster-Truck-w-Electronics-/282264575102?hash=item41b8479c7e:g:QZEAAOSwImRYKnKP
I...