Natural yeast substitute?

[HeyLewis]

I am trying to brew this oddball recipe this weekend. Its a recipe derived from tablets and whatever they could find about brewing beer 4000 years ago, a really interesting read if you have the time.

http://byo.com/stories/item/144-archaeobeer

But anyway, the jist of it is first you make a 1 gal date wine starter by mashing dates and letting the natural yeast take off. Baking a bread made out of smoked malt turned into flour, then brewing a very smokey beer with plenty of honey. Combine the three and you get a weird smokey-fruity-beer-wine (which is what im currently calling it lol).

The problem I am having is I made the date wine, but I bought dried dates and I dont think there ended up being any natural yeast on them since its been 2 days and the fermentation hasnt started up yet. So what would be a good yeast to substitute for a natural one? I am planning on brewing it on sunday so I still have time to get some, but I dont want to let it sit for too long for fear of some bacteria or something taking over with no yeast to take it over.
So what would be the best yeast to use for a sub that would be the closest to a natural yeast like what the recipe calls for?

 

[Dan]

Maybe rasins?

 

[whitehause]

I'd wait a little, Wild yeast can take a little while to get going.