High energy disc tumblers

It seems like these were being put forward by many of the suppliers
a decade or so back. Now my situation is such that mass finishing
with a quicker turnaround makes sense. The only machines I am seeing
offered by my regular suppliers are too big and expensive. Does
anyone have any suggestions for mass finishing batches of 50 pieces
or less that is quicker than traditional tub-vibratory tumblers?

Steve Walker