Jim,
I believe the tech is telling you that the FEL kit is not available because they haven't made the primary support (girdle) to attach the rest of the loader on for your specific model.
So far, we have purchased two loaders to match the size and horse power of the tractor, including all the hydraulics, pins and hardware - including the wrong support. We have designed our own with 5/16" plate for the primary support with 3/8" diagonal gussets forward to the engine frame bolts, and reward to the transmission threaded bosses. This design spans the area where one would normally split the tractor for clutch repair. We have done it this way so that it doesn't amplify the weakest section of the tractor.
The measurements are critical and so is welding level and square....but it is not difficult to lay it out, cut the metal and tack weld it all together. Even if your not comfortable doing it from square one, a good fabrication shop should be able to do it in a day for a few hundred dollars. I just didn't want to wait for someone to invent one because I needed it now. And you can make the support fit any manufacturers loader.
Regards, Mark