Hi traceym43,
When I talked to wholesale furniture brokers they told me they didn’t have any of the Boyd latex on the floor.
The Boyd Natural flex Ultra line is a polyfoam/latex hybrid but they use the talalay latex on the top of either polyfoam or more layers of Talalay or Dunlop (the latex layers vary from 3" to 9"). They would also make a good testing ground for the feel of latex and could also have good value depending on the price. It would be nice if someone carried them locally.
http://www.sleepcountry.ca/storesearchresults.aspx?d=50&l=Kamloops-BC has a mattress called the Zenbody which is 9" of what Sealy calls “smartlatex”. It would be closest to Dunlop latex although it’s mostly synthetic and has inserts which “zone” the latex with other materials so it wouldn’t feel quite like 100% natural Dunlop but it would be “Dunlop latex like” and give you a bit of a sense of what Dunlop latex feels like (it may be on the firm side). (ADDED they no longer carry this mattress and there is nothing else there that I would consider)
Novotech is very nice but it is also very pricy and I didn’t find an outlet near you that carries it. It also uses many different layers but at least one of the models (the neutral sleeper) uses talalay for the top two layers.
It seems that the only place (at least that I’m aware of) that you could test various different layerings of both Talalay and natural Dunlop is in Kelowna.
If I discover anything else I’ll include it here and if you find something I’ve missed then I hope you let us know as well 
ADDED: See post #2 here for the Kamloops area and post #4 here for some better options in the Okanagan area.
Phoenix