2000 R1100RS

I just bought a 8.5+ Cee Bailey's Windshield from BeemerBone Yard. The holes in the new windshield are larger than my OEM windshield screws with the little black plastic washers. I need help figuring out how to mount this without cracking the plastic. Cee Bailey's said the OEM screws should work, but the holes will not hold the screws without some type of large flat washer.

This is a picture from their website that looks like large flat washer are being used.

Any help would be great

http://www.ceebaileys.com/bmw/bmws1100rs.htm