Seems to me that this would end up being more trouble than it is worth. I have a client I am going to be implementing this solution for who does not want to do ecommerce and will just have a phone number to call to order due to the nature of the product which requires customization. So it is going to be used just as a catalog with a toll free number. I don't think it can get much easier than that. I can see a lot of problems with an emailer solution such as spam problems with the order not getting there for whatever reason. Maybe you could find a way to incorporate a secure form mailer plugin like this one: http://www.dagondesign.com/articles/secure-form-mailer-plugin-for-wordpress/ I am not saying I know how you would do that, but I guess what I am saying is look around at plugin solutions that you might could use to make your idea work. Just a thought.