I recently had the Templates that BIGLRY is referring to... I have since forwarded them to the next requesting forum member.
You can access them in this thread.

I just laid them on the back of a nice Rubber Backed Door Mat that I found at Lowes ($7.00) and traced the Template with a silver sharpie.
Cut along the silver line and made these:

Attachment 25288

I must admit though, $19.95 for a pair of Edge Bound Carpet mats is a pretty good price too.
I just wanted something that wouldn't soak up and hold any water... hence the Rubber Backed Outdoor Carpet that I used.

In my case, the rubber strap in my bag is under that carpet (no need to cut any slots through, as it only holds down the Owners Manual), I have a much more robust "Roll-Up" toolkit that I keep in the other side.

Just my $.02.

Jim