if you hack this up you may be able to fab up a nice interface with some momentary buttons behind the remote buttons:

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New System in progress:
M10k
Phaze TD1500 ~> Dynaudio MD130
Phaze TD1500 ~> Seas g18rnx/p
Zapco Ref 500.1 ~ 12" tc-9
Behringer DCX2496 ~ Envision Electronics psu
Transflective Xenarc
My Car Pc Install