You actually might want to try the local fruit in your area. They are generally covered with wild yeast and will provide an interesting local flavor. Really this is how it all started anyway. Now identified genetically that lager yeast are a hybrid wild yeast from south America crossed with a European ale strain. Most wine makers use the yeast colonized on the grapes. So if all else fails, I'd take a few pounds of fresh fruit you can find, mash it with skins and add to the wort you made. You might just be the start of of the newest white labs Serbian yeast strain.