This is one that I've actually bought before:

http://www.ebay.com/itm/161301551378

It also has a magnetometer-type compass which might be useful to you.

Bob

--=20
http://www.fastmail.com - Email service worth paying for. Try it for free

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.