those are the rulers. most of us have purchased them thru this ebay seller. the price is great, shipping is reasonable, and she ships super fast.
at least 10 of us have used her so you can totally trust her.
http://cgi.ebay.com/Dear-Jane-Tools-...item4148dd940c
some one just put up an ad trying to sell the software but i don't know this person and she hasn't been here long or posted much so i know nothing about that person.