The tool below is being sold on Ebay for W107's and the picture seems to show that the plates can either be attached in the middle or from the side. I'll have to check mine tonight, but if this is the case then perhaps I can use this tool after all.

Steve

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4552230356&category=35625&sspagename=WDVW#ebayphotohosting