Q&A: I can’t stand it
Does it already exist? Probably not. The Pletscher MultiFlex is designed to be clamped to the seatstay and chainstay of a cycle not made with an integral side-stand mounting boss. The design of the stand does not look easily adapted for use in conjunction with a rear disc calliper, so your best bet may well be to sell the MultiPlex and look for a stand that will either work without modification or can be more readily adapted to your requirements.
Cycle magazine’s technical editor