If you don't mind the foam freewing (look on motion rc) makes some really scale jets that will take the T-50

Fiber glass is a littler tighter there's Sebart mini Avanti, Jet Hanger has some nice kits if you like building

Wood there's some jets made by black horse has an L-39 \ BAE Hawk by phoneix model (same company) and a nice size sport jet called the perceptor