In case you were innerested, I was scanning W123 parts anyway, and found these used switches:
(Although they appear the same in display mode, there are four different listings below, with different item numbers included within the whole link)

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=4612367835&ssPageName=STRK:MEWA:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=8037989658&ssPageName=STRK:MEWA:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=8037615495&ssPageName=STRK:MEWA:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=8037615501&ssPageName=STRK:MEWA:IT

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stanbabu@3bubbas.com
59 300d
65 250SE/Cpe
70 250/8
72 250C
78 280CE