When I first received my Pinguicula jaumavensis, it arrived smashed and beginning to rot. In desperation I sprinkled a light dusting of dry RootShieldŽ powder on the smashed and rotting pile of plant parts. I kept them on a dry paper towel in a cool, humid, and well-lit spot under my fluorescent lights. The rot was arrested and not only did the original crowns recover and begin to grow, but most of the severed leaves that had began to rot, sprouted plantlets.
Perhaps a similar treatment, such as dipping your difficult species leaf-pullings in RootShieldŽ, (like cooks sometimes dip meat in flour to form a thin coating), may help them to survive until they can grow for you.