Not sure about patches, but I've been collecting pins. I get as many as are available, once they become available, from mountainclimb.com and pin them onto a white HP club ball cap I got from the Merc (shameless plugs for both, but I get nothing out of this, so there we go!).
Anyway, what I've found is similar to what you seem to be experiencing: there aren't pins for, say, Timm's Hill. For that I picked up a generic Wisconsin pin. My hierarchy is 1) a benchmark pin from mountainclimb.com, 2) National Park pin (e.g., Guadelupe) or 3) generic state pin. You may have to do something similar.