For now, PIU scoring in SM and spacing are not the same as the real PIU arcade... not to mention grading, hold scoring, etc. A Cobalt Flux's button placement is also not quite the same as a PIU arcade pad's button placement... the way to use a CF with the real PIU PC games is probably through Joy2Key
If you do want to get a PIU metal pad only... try looking here though... since these seem to be cheaper than Cobalt Flux:
Pump Haven::iB::Topic::Pump metal pad thread topic post forum thingy
You should try contacting Technomancer about the pads (there's a video of the pads in use in that thread).