One of our members just acquired the molds for the Conquest VI and VII among several others (from PAC). I believe he will be making an announcement shortly about kit availability.
The C IV was also kitted but by Larry Phillips (with several other great kits), unfortunately those molds seem to have vanished. The VI and VII use the same foam cores for wing, stab and rudder. The VI has a bit more fuselage side area. I had one of each and preferred the VI (with a Hanno, of course).
The Desire is a great flying airplane - I ran the pipe under the wing, too. I still have all the parts to build another. It's on my 'list'.