I only use 505 in the red can! I buy it by the case, and have split a case with another quilting friend when she was in need also. ...
Here is the link to where I purchase it on the internet. It is the best deal that I could find and service is fast also.
http://www.sewforless.com/item/505_T...17_oz_Can/7391
Good luck with your quilting adventures.