Who Sells Bryophytes

[Adogowo]

Hi everyone, I have been keeping various reptiles and amphibians since childhood, so I am no stranger to a planted Vivarium. I have a problem though, I would like to know if anyone has the name of a good fieldguide book and/or the name of a supplier who sells not only mosses, but liverworts, hornworts (on land type), and lichens. The Colorado climate limits me to collecting locally. I am in the Denver metro area if anyone does know of local areas/ shops. I really love the "british soldier" lichens with their vertical stalks and red caps. Here are a few example pics of what I am looking for. Thanks for any information.