Lowes had what I needed. It took three rolls of this to do the floor in my convertible and runs about $17 per roll.
http://www.lowes.com/pd_154017-81326-PS625_4294736327__?productId=1018733&Ns=p_product_avg_rating|1&pl=1¤tURL=%3FNs%3Dp_product_avg_rating|1&facetInfo=