Tyvek or brown kraft paper if they are going to be stored. Tyvek will cost you more, but you can pass the cost along to the customer. Don't use plastic unless it is for deliver only and will be unwrapped when you get to the consumer's house. Keeping natural fibers such as wool and cotton in plastic can lead to condensation, mold, etc.
Rug wrapping paper is not an Interlink product at this time. Maybe next year. However, some Interlink distributors may carry it. They are independent and can stock whatever they think will serve their clients. Here is a place in your general area that has the kraft warappin paper. ABEL Industries 16815 Interstae Drive Dumfries, VA 22026 703 550-9446 Ask for Jean.
Rug Wraping I use kraft paper and pick up 900' rolls for about $35 each at a local paper supply house, Elgin Paper Co.. Shipping may be pricy because the rolls are heavy. http://members.afflink.com/scripts/cgiip.exe/WService=memord/memord/npitemdet.htm?mbritm=0x0000000000d6e709
Kraft paper you can get at Grainger - we get our Tyvek paper from Material Concepts - if you call them, ask for Doug and mention my name he'll give you a great deal. Lisa