BOB URZ wrote:
I have three customer year 2003 ford factory E350 (3C2T-19B132AC)

Google gives http://www.mnrelectronics.com/foramcasparf.html which wants
to sell the whole set - they claim they do service, perhaps they might
clue you in to a parts source.

The rotary encoder/switch volume control is self destructing.

Can you replace it with something from Digi-Key? It might not be
beautiful, but if the customer is faced with $100-$200 to put in a
replacement stock or aftermarket radio vs. a $50 repair that looks a
little goofy, they might decide that they can stand a little goofiness.
Also, if this part fails a lot, replacing it with a stock part might
just result in a come-back...

Matt Roberds