I found this on Ebay. I looked and its the same starter as on my 620.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=10065&item=2427975253
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=10065&item=2427975253