Most people that use prestas and ride for long distances have one of these on one of their valves or at least in their seat pack.
There is an idea, maybe my Brother in Law could start surgically implanting those in people and then your odds of finding a source for airing a presta tube would start to rival that of a schrader. Raiyn, seriously I don't care, I am just having fun with you.
I think the poster and other readers should be able to draw his/her own conclusions and decide based on that.