Draco for the bottom of slide outs. Where can I purchase?

[Pocketlake1]

anyone have a recommendation for purchasing the 4” rolls of Darco, other than Camping World, who charges about $1/ft

 

[Pocketlake1]

I did find “every underbelly repair” material on Amazon but that has a plastic coating on top of the Darco and is not very durable. The material from CW also has a paper backing on the adhesive side. Great quality but hoping I can find the same that is not RV prices.