Can someone direct me to a site that has cake dummies in 3"x3". they seem very hard to find. Thank you!

Taylor Foam should be able to custom make that size for you, call them and ask:
http://www.taylorfoam.com/taylorfoam_com/contactinformation/

Dallas Foam would be another option:
http://www.dallas-foam.com/store/cakedummies.html

www.dallas-foam.com

I was going to suggest Taylor Foam also! They are really fast and easy to work with, I also think they are priced very well! I had them cut me some custom size foam pieces for a cake and they were extreming quick with communication and getting the foam out to me!

...thanks so much. I just hadn't gone so far as calling one of those companies to ask if they could do it. I ordered some this morning. Thanks again.