I need to implement separate pricing for users different roles on my site, by choosing between a "member price" and a "non-member" price.

To implement the two different prices, I've set it up so that my products have two additional price fields (member price & non-member price).

I would like to implement the choice via a product pricing rule; and I've been able to use the "Set the unit price to a specific amount" action to set the price to a specific hard-coded amount.

Unfortunately, I can't seem to figure out how to get the member price field to show up as a data selector for the amount. I've tried adding a condition to require that the line-item entity has the member price field, but it still doesn't show up.

Am I missing a step? has anyone gotten this to work?