I do not recall the specific question as to custom builds coming up during the Q & A, though the question of other models and electrics was discussed briefly. There were a lot of "not now but we are thinking seriously about it..." type answers on this one. From my personal perspective, they really have their hands full doing what they are doing, and each guitar they put out now is viturally a custom build, there is THAT much hand work on each one...some parts may be CNC'd, but the whole guitar assembly is a person doing it by hand, one at a time.
Unfortunately my wireless listening device the factory supplied gave up the ghost right as we were going into the paint shop, so I didn't get any of the info during the tour on finishes.
Also never addressed directly during our tour, but I understood somehow/somewhere that the Hamer facility is essentially a custom shop. While we did see some Ovation pieces in process during the tour of the parts fabrication facility (mandolin necks come to mind), if I am correct most of that production has been moved overseas.