12 v .45 amp 4-11/16" square by 1" thick 88 CFM muffin fan Sanyo 109P1212H402; $5.95 (plus shipping) from Marlin P. Jones & Assoc.
www.mpja.com (thanks to Early S-man for the source).
Installed muffin fan from passenger side footwell; note that return air to the evaporator in smugglers only had six hole saw holes to pass through. I connected the tangents of the four larger holes leaving tabs to mount muffin fan. Lack of return air cross-section is a problem with some of the "dealer installed" A/C systems.
View of muffin booster fan for return air from inside empty smuggler's box before evaporater/blower unit is reinstalled. The muffin fan is wired into the compressor clutch circuit. It comes on whenever the thermostat switch (temperature switch) turns on the compressor.
This afternoon the car (parked with sunshade in windshield) dropped from 115F duct temp to 60F duct temp in 5 minutes driving at 35 to 45 mph with about 90F ambient, full sun load and driver.
More later, Jim