Lab Safety Supply has a nice selection of rubber matting, including
the diamond plate style. They aren't the cheapest place around, but
they have good quality stuff and are reliable folks.
I've bought stuff from there on several occasions. (no other affiliation)

Here's some diamond plate mats, they have many other types as well:
<http://www.labsafety.com/store/product_group.asp?dept_id=1532&cat_prefix=4WA>

Steve
EJ22 -> '86 Westy "Escape Pod"

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.576 / Virus Database: 365 - Release Date: 1/30/2004