My local Joann's doesn't carry 505 for some reason - only Dritz and June Taylor. Online I found Joann's does carry it, but it is not in the Quilting section, it is in the Adhesive section and it is in both the 11.5 oz and 17.5 oz size cans.
When I did an online search for it on the Joann's website it could not be found, so it pays to search outside the box if you are trying to find it online.