Unfortunately, I can't give you a link on where to buy this exact plane, but Phoenix Models offers a 65" Sbach 342 on Tower Hobbies:
https://www.towerhobbies.com/cgibin/...

They also have a smaller 55" Sbach that should be restocked in midJuly
https://www.towerhobbies.com/cgibin/...

This is Dave's remaiden of his big 'ole 73" HobbyKing Sbach 342. He flew it once but the elevator servos he installed were not up to the job and he nearly crashed the plane. Watch the video to see how he made out after upgrading the elevator servos.