Thanks to a great idea from Mark Anderson (and his follow-up with contact information) I now have a source for Tyvek backgrounds. The idea here is to use something that will not scuff and tear like regular seamless. Wanted to share this with everybody who thinks this is as good an idea as I do. This stuff comes cored like regular seamless you get from Savage and the price is really reasonable I thought. The supplier's name is David Goodling and his email address is firstname.lastname@example.org
Here is and exerpt from David Goodling's email to me:
I charge $1.98 per linear foot for the Tyvek. The cardboard core and cardboard shipping tube with end caps cost another $12.00. I charge actual UPS shipping, which varies slightly depending on the amount of material you purchase, but is typically in the $25 - $35 range.
For example, if you wanted 35 feet of Tyvek 107" wide this would be:
$69.30 - Tyvek (35 x $1.98)
$12.00 - core & shipping tube
$30.00 - shipping
I can give you an exact quote once I know your zip code and the amount of material you intend to purchase, but the above example will be pretty close - within $5 or $10.
Thanks again to Mark Anderson for the idea and the information.