anybody know who makes them or know where i can get a blank one? i really like the magnetic back to them over the cameron AM&E covers.

if you like magnetic putter covers you could try Como! Come! ones
they might be a little busy but some of the designs are VERY cool
you could find them on www.tourspecgolf.com or www.comocome.com/order

I own a black series putter and for the cover, you can buy them from your local golfsmith. What a coincidence, I've just been there after work today and they've got tons of those (usually given when a new putter is purchased but you can buy it separately).

Cheers!