we use two quartz flash units with our Automatic. I would be very leary of using one to cure shirts. You would be amazed at how easy it is to ruin ash t's even at a 3 sec flash.
Do it right and get a dryer. Search the many classifieds forums at
U.S. Screen Print & Inkjet Technology M&R Companies, Amscomatic, Nuarc has a used equipment email list and there are others out there