Trying to use templates from within Canon Professional Print and Layout

I apologize if this question has been asked and answered before, but here goes:

I am using Canon's Professional Print and Layout plug-in from within LR Classic.  That works well, but I have a dilemma:  I print to Red River's greeting cards quite often, and use their very handy templates.  Those templates provide paper size, a slot for the image in the right place, etc.  

However, I cannot find a way to use those Red River templates from within the Canon print plug-in.  I see the option to create my own layout, but I would rather not do that, as the templates from Red River work perfectly.

Any thoughts on how to access print templates from within the Canon print plug-in from LR Classic? 

Thanks!