Hobby Horn and Midway Models were the same business. Might try
www.freeflightmodels.com as he seems to have picked up on some of the older designs that Hobby Horn marketed.
Notice that the name on the above Thermic 36 is John Zaic. Could be that this design was reintroduced as a kit later thus you see the build up wings and fuse. Same with seeing the truss structed fuse for the Thermic 100 rather than the balsa block and tail boom of the earlier design.