I purchased a 12' roll of Shaw Veranda carpet to outfit 5 sluiceboxes last year. I sold the remaining pieces to our local gold club members. Everyone likes it better than the conventional ribbed carpet you see in the commercial boxes.
I just received another 12' roll and after cutting several pieces for more club members, I'll have a bunch left over.
The attached image shows sizes and prices. The large 12" x 48" piece had a shipping cost of around $7.00 via USPS.
If you have an odd sized sluicebox, I'll cut to your specs.
Email the address that appears on the image...I don't want to type my email in order to prevent bots from sending me spam.
Also, if you have a few minutes, check out my blog at http://bedrockorbust.blogspot.com
Bob