How to go about getting a new arm board for a new tonearm

I have a VPI TNT Jr. with the upgraded motor, super platter, motor controller, 10 inch JMW arm, peripheral ring.  It sounds decent enough but I hate the tonearm.  (The wobbly unipivot - just fed up with the design).  I would not get another VPI arm.  My question is, I have the VPI table with the rectangular arm board.  How do I go about getting a new arm board for a new tonearm?  I'd like a Tri-Planer or a Graham but not sure who to look at to get the armboard.  I doubt VPI would send me an armboard for another manufacturers arm.  I would love some direction.

Thanks guys!