Radio head unit help

[NewType72]

Hello I'm never usually in this are of the board but doesn't mean the family doesnt own just about ever year from 72-2001 but I'm hear to ask about the radio head unit in my mom's 96 Chevy pickup. I hear they go out pretty easy and since it's about 16 years old it seems to have given up the ghost so now here's my question

Where is the best place I can find a new/reman'd head unit to replace it and how difficult other than pulling the bezel off and disconnecting and swapping units?

Found this in a quick 5 min search
http://www.ebay.com/itm/Chevy-OEM-AM...61c688&vxp=mtr

Thanks for any info and advice in advance