.
This may be a long shot, but if they have one it will be worth the e-mail inquiry There is a Company on the East Coast of the US that has a large stock of used Mercedes Glass, I don't recall their name, however they were happy to ship a rear screen for a W107 to Australia and had a few in stock.
E-Mail Anakela (female) at AnakelaHI@aol.com, you will be able to ascertain, who and where they are and if its viable. By all means mention you got her contact from the crazy Australian! May be worth the e-mail if your serious. Hope that helps. Just posted this on the site for someone chasing a 560SL screen. May help, so worth a try and they were very reasonable and extremely helpgul considering where I was.

Brian
280SL