One or more of the interface products here might be the ticket:
http://www.go2pac.com/
Look under Products|OEM Interfaces.

These say they interface directly with the Bose product. And the steering wheel interface gizmo might be exactly what you need. This works with Kenwood products in the 38-40khz infrared range, so if Kenwood remotes work with the empeg then....

What is the empeg remote frequency?

Good luck,
_________________________
-- Terry K -- 30Gb Smoke / Toyota 4x4 30Gb Amber / Bounder RV Pants first, then shoes