2 usual ways to do this, but you have to be wary about the condition of the parts you'll get:
Find a wrecked SMT, swap over the trans+ hydraulics, ECU, engine & body harnesses, steering wheel and shift selector, then sell off the rest of the wreck.
Find someone who wants to swap their SMT to 5MT, and trade all of the above parts .
Or, find someone willing to sell you all the parts from a working SMT system. I'd be happy to sell you all the above from my SMT for $1800 + shipping. I'd even let you drive the car beforehand to verify all the SMT bits work great. But that won't help if you're not local.