'03 EB with factory NAV - back-up camera options?

[kep5niner]

I've got the factory navigation unit installed in my 2003 Eddie Bauer. I'd like to install a back-up camera, that displays on the nav unit. Has anyone done this successfully? I stopped by a local stereo shop, and they simply wanted to sell me a new head unit that would make back-up camera integration easier. However, I'd like to maintain the OEM nav unit, and just utilize that screen. Any ideas?

 

[Yupster Dog]

Might ask Hush car audio, they have a section in forum vendors

 

[kep5niner]

Thank you!