Is there any website with pontoon variants?
my example:

6D
S17
no hole card, ENHC
only 1 card on split aces, AX is only 21 after split
double 4 times possible, but if you already have 4 cards you can only double hard 12 or more. free card on 4 card 11 or less.
hit after double possible (i.e. take card without double again)
pontoon pays 2/1, looses against dealer pontoon
dealer wins ties
any 5 card trick pays 3/2 at once, before dealer takes a second card
dealer does not benefit from 5 card trick
player can hit or stand when (s)he wants, i.e. need not hit 14 or less (as in the example on the page of Wizzard of odds)
no surrender

can anyone tell me where i can find anything about such a game

What influence has the count at such a game. for example the propability of a 5 card trick goes up at negative counts. what is the final efffect of positive and negative counts?