We found these in the bargain bin at Target yesterday: $2.50 for a set of two bamboo placemats. (The centerpiece is a basil plant we use for cooking.) For day-to-day use these inexpensive mats were what we needed...
...simple, durable mats that can be wiped down rather than put through the wash. We didn't want to buy plastic placemats, so we were a bit stymied until we found these.
They're not available online—you'll have to venture into your closest Target to find these. There is also a matching runner for $2.50.
Crate & Barrel has the Kiray placemat, a similar product, priced at $4.95 each.