I've posted this information about my B7100D before, and I believe that it is true for the gear drive B6100s (B6100D and B6100E) as well.
For the gear drive B7100s, there WERE many attachments available when the tractor was new, such as mid-mower, FELs, front blades, etc. Parts for all of these implements still seem to be available.
The
B7100 hydrostat model had a different design and would not use the attachments designed for the
B7100 gear drive (that statement does not apply to 3-point equipment). The B1630 FEL (and the later B1630C version) was the FEL model that was also used on the
B7100 hydrostat but would not fit the
B7100 gear drive. I did a pretty thorough search and learned that NOBODY makes specialized equipment for the
B7100 gear drive any more. There are 3rd-party manufactures that still make attachments for the
B7100 hydrostat (such as a Woods FEL), but not the gear drive model. Unfortunately, a lot of the 3rd party manufacturers sales people don't know enough about the differences between hydrostat and gear drive Kubota B7100s, and almost sold me a FEL that would not have worked (I just happened to see the note about it not working on the non-hydrostat models).
Bottom Line: I don't think that you'll find a NEW FEL for the
B6100 gear drive. You may be lucky enough to find a used one, though. In any case, if a FEL (or any other equipment specially designed for the
B6100) is important to you, you might want to dig a little deeper and make sure that the equipment that is advertised as manufactured for the
B6100 is in fact manufactured for the gear drive model and not the hydrostat model.
Kelvin