Price Per Role + Signup Integration for Ubercart

The Signup Integration for Ubercart module allows any Signup node to be an Ubercart product. Ubercart Price Per Role allows us to sign up full year members for a different price than non-members. These work great for most cases.

However, if a member signs up additional guests, then the guests get the member's rate, regardless of the guest's membership status. We'd like to charge the member rate for the member and the appropriate rate for the guest.

Is there an easy way to do this?