Not sure if Roscoe has had a chance to inventory everything yet, but if your talking about the brake discs, that is a fairly common item. I think all the Grummans used Cleveland P/N: 164-02000, which is common to other planes too. The Rapco PMA equivalent is RA164-02000 which sell for about $90 each. I have an extra one on the shelf.
It turned out that the rotors were still within limits (barely) and the decision was made to continue on with them. I’m certain they will be needed next year. Thank you all for your comments