I needed this for my ikea cabinets, because I drilled a 2 ½" hole in them to feed my ½" pex lines with supply valves thru.  It left a giant hole in the bottom of the cabinet so I designed this 2-piece trim to finish it out. 

I figured I may as well upload it in case anyone else needs it.

Print 2x with flange side down on build plate.  Then assemble it in place around the PEX.  If you want, you can use super glue to glue them together around the pex, but I didn't feel the need for it.