It is a little "spendy" but check out www.emergencyseedbank.com
23 non-hybrid varieties and 37,000 seeds packed in resealable foil packets in a sealed "tackle box". It comes with a 35 page "growing guide" for the vegetables and a 24 page "seed saving guide".
I am also worried about the disappearing vegetable varieties ESPECIALLY non-hybrid types that you can continue with year after year by harvesting seeds.
I am going to experiment a little with seed harvesting in my next Spring garden.