Bonsai plant selection help needed for region 10B Pakistan

I am from region 10B Pakistan. I am currently on a short trip to the US. Need help in selecting a few bonsai plants that I can tack back to Pakistan. Both indoors and outdoors. The only thing I know about Bonsai trees is that I like them. No prior experience with bonsai trees.

Since I would be leaving in 3 days, need to know what is the best place to buy in Philadelphia area.

Thanks in advance.