1 yes they are all still around..in there place of origin. And anumber of vendors as well.
2 I think you could recreate most of the flavors and highs from long worked varieties. Time, luck and numbers is what it would take.
I have a few, not enough, the effects in some, are mellow. While others are devestating and could hold their own in todays heavily worked varieties. I will in the near future obtain most of the available sat. From as many different vendors as possible. Then the work begins in making f generations while selecting for superior individuals. That will not be in the near future
Great luck to you bud.
Peace