If your mobo doesnt support SLI then a bridge isnt going to change that. A bridge si just a connector over the top of the cards, AFAIK both need to be plugged into a suitable socket on the mobo. Not supported means just that- otherwise there would be no need fo rSLI support!
As far as the cards go, if you get a 1060 and SLI it with a 950, they will both run at the lower speed. I would go with just a 1060, as this SHOULD givebetter performance that SLI with th e2 you mention. Of course, that would need a supporting mobo, and I guess that isnt what you are looking for.