Trying to look into getting the MLG wheels aligned on a 2007 DA-40, going through tires at the cyclic rate. Looking into shims, I found the PN: D41-3213-11-53, but the only results when I search for those shims is one vague listing on a small parts site I've never heard of, one forum post from this ...

Hi guys. New here, actually just about to go out to the plane. I'm an A&P, but not super intimate with the DA-40. Not that the stall horn is a horribly complex system but it is being a thorn in my side. Stall horn stopped working suddenly. Popped off the glareshield, pulled the horn out and trie...