Like others, I also recently got a 3D printer.? I've mostly used it to print custom hose adapters.? I've posted the STL and open cad files for a 120mm to 4 inch quick connect adapter that I use on my saw and a 80mm hose to 4 inch quick connect that I use to connect the same 4 inch hose to a "tail" of 80mm hose that I leave attached to the shaper dust port.? I modified both from this design on thingverve.?.? You may need to tweak the settings in openscad to get a good fit on your machine based on variances in printers.
I also found this handy sliding table nut for the BF 631 there?