Let me recommend two sites to explore. Egars.com has a lot to choose from in that range. However, most every brand they carry are available in fivers and singles. That's why I tried them in the first place. I'm on my 3rd order with them.
BestCigarPrices.com may have a few more choices in that range. However, far fewer are available in 5/s. I have no experience in ordering yet, but the return information after I registered looks encouraging.
Egars has let me find these. Mexican Segundos maduro are quite tasty in the smallest size.
I'm on my first bundle, and have ordered the next size up to sample in a fiver. I was surprised to find that Drew Estate produces a bundled line called Blue Ribbon. I'm on my 2nd-fiver, just to make sure, but it looks promising.
Three brands I enjoy happen to be from Ventura Cigar: Hugo Cassar, Estilo Cubano, and Cuban Rounds. HG are natural only, EC maduro only, and CR's come wrapped with either.