CMs here aren't supposed to, or really comfortable with this (as seen from prior requests in this thread). It just goes a little beyond helping information wise, honestly.
Your CM friend will need to check for you, and they can do so by calling the CM line or using the HUB. Anything someone checks here anyway may not be available by the time your CM calls. If they're willing to get you the discount, they should be happy to check availability for you.