This 1/48th scale Gemini capsule (Ton Noteboom’s design) was flown to 95,000 feet on a balloon by  JP Aerospace. However this is not the highest one of Ton’s model has been flown.Astronaut John Grunsfeld took a model of Ton’s Hubble up in the space shuttle on Repair Mission 4 to the Hubble.

You can find Ton’s 1/48 and the 1/96 scale of  Gemini-Titan II over at the Lower Hudson Valley Challenger Center Paper E-Gift Shop (scroll down the page of real spacecraft models)