I got mine at Radioshack a few weeks ago for around $5. It holds 2 eTrex units just fine. I would recommend though that you don't keep the pad on the dash because it can cause your dash to get discolored (or more accurately, the sun will cause the dash to get discolored, but it won't be discolored the same amount under the pad). Just FYI. Works like a champ; I haven't had any problems with it falling off no matter what speed I drive at.
- divideby0
All your math are belong to us.