I have 9 used Pico Macom XUV converters for sale, all in good shape and working. 4 have low-band ouputs (ch 2-19) and 5 have high band outputs (ch 7-36). These can be tuned to specific inputs and outputs with DIP switches and tuners, with or without a sweep generator and spectrum analizer
look here for specs:
[Link: picomacom.com]
asking $65 each + actual shipping costs
Paul