This site is interesting - specializes in converting OEM radios to external perhipherals:

http://www.peripheralelectronics.com

The TICLRX is compatible with 98-01 Toyota/Isuzu CD changer to Clarion - there's actually a few on eBay right now and it may be worth taking a chance if you can buy it cheap:

http://cgi.ebay.com/ws/eBayISAPI.dll...707970152&rd=1

This may satisfy those of you who want to keep the existing head unit but change out the changer into something better. Note that I haven't tested this - perhaps someone out there with better knowledge could add some info.

-- Best, John