I found 2" clear on ebay for $6.20 for 12". They also have different lengths (1, 2 5, and 10 feet). I think 10' was $19.99. shipping is free. No affiliation to them I just found it searching.
Here's the link
http://www.ebay.com/itm/3M-Safety-Wa...ru0ksbePdiWWFg