Well I've been looking at protective film. Here are some suppliers. Notice it comes in various thicknesses. 8 mil to 40 mil.

Best price per square inch. 40 mil thick AND the manufacture. You can buy it by whatever measurement you want. I'll probably buy from them.

http://www.xpel.com/products/bulk.asp

Auto sport has a generic size. 2 sheets of 19" X 8" at 40 mil thick for 44.95 + 9.50 S&H. Xpel for the same thing is $33.50

http://www.autosportcatalog.com/index.cfm?fa=p&pid=332&sc=7542

Griots has some good quality stuff but a little expensive. And only 23 mil thick.

http://www.griotsgarage.com/search.jsp?searchtext=headlight

Clear Guard is not quite as thick

http://www.clear-guard.com/bulkmaterial.asp

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car