wil
the dual jfet boards are just the 992 based servo output stage for the opto comp, which was incorporated into the main opto board, along with fred's power supply. so if you order the opto comp board from tom, it already has that circuitry incorporated. see the "parts list for forsell [sic] opto comp" thread for complete schems.
if you want to put fred's servo output stage or power supply onto something else, you could take the gerber files from fred's site and have them made by a pcb shop. i don't think fred is selling those boards; he just donated the layout for the opto comp boards.
ed