Hey Sagebrush! Glad you stopped by here in the Rocky Mountains!

So, I just did a quick search for Jamesia americana on the Google, mostly because I was curious about what it was! Well, It looks like Plant Select, which is a partnership between Colorado State University and the Denver Botanic Gardens to select and develop plant cultivars to gardeners that are suited for this particular regions climate did in fact did introduce a wax flower in 2003. Waxflower-PS

IF this particular plant is still available through them, I suppose you could talk to your local nursery and see if maybe they could find a way to acquire one, or here is a link to mail-order nursery's that carry Plant Select. Retail Mail Order.

If you go the "where to buy" tab at t top of either of those links, it also provides landscape & wholesale listings that might help you if you ask your local garden center if they would be able to give you a hand.

Hope that is a good (or at least new) lead for you that might be going in the right direction!