That's a shame!
I've dealt with Rex and Shirley several times, and never had a problem, and they beat any other Cessna dealer on price! I've never understood Cessna's policy on minimum quantity!
Try
Preferred Airparts [
preferredairparts.com]. I've bought individual items from them, also. Much of their inventory is NOS overstock, obsolete items, etc., that they've bought from Cessna dealers.