Hi ctroxtell,
The foundation thread here should help and has many reasonably priced options that are available in Cal King
Post #7 here has some good information and links to other posts and resources with good information about sheets and fabrics.
Post #89 here talks about the 3 main types of mattress prtectors and the strengths and weaknesses of each including their effect on the feel and temperature of a mattress.
It sounds like everything is starting to come together 
Hope this helps.
Phoenix