Do a search on the forum for Husqvarna rapid release blades, look for lawn goblins thread on it from 2015. On page 3 you may find a solution which will let you use standard 5 star blades.
I'm considering removing the rapid release mechanism from my Craftsman and using the star blades you posted. I have a mulch kit and mulching blades, but I do not care for the design of the rapid release blades. They are difficult to sharpen with all of the curves and the plastic housings for the rapid release system will not stay in place. Cleaning the plastic covers and trying to get them firmly seated takes much more time than unbolting standard blades. I do have a few questions for you:I took mine off of my craftsman,you can take off that quick release,and go with a regular 5 star blade