We have found a bag of a few misc Cessna Aux wing tank ribs and parts that says they are for a Cessna 310 if you look them up.  Some of the P/N are 5316509-2, 0823332-7, 0822027-5 and 0823333-5.  Take one take all. (See photo) we can't use them on our Cub Crafters' Cubs but anyone with a Cessna 310 might be able to.  They are suplus stock.