Trails to the Past has been working on compiling photos of Colorado cemeteries. Here is the link: http://coloradogravestones.org/
Not all headstones have been documented yet, but for Frisco, the majority of the cemetery is done. Very small site. You can search for Summit county, then narrow down to Frisco.
I have been working on Summit genealogy sources for a couple months... although I don't have anything specific (yet) on the people you mentioned, there are several sources listed on our site for Summit County: http://www.rootsweb.ancestry.com/~cosummtp/
See if anything there helps you. Let me know if there is something you would like to see added or anything further I can help you with. (Live in Summit county, so look ups can be done.)