Unique Membership Benefits in TNEW

We offer members of our museum a $10 discount on what is known as a Walk of Honor Brick. It's essentially an engraved brick that fits into areas of the walkway leading up to the museum and the memorial. Purchasing one is considered a contribution. Does anyone know of a way that we can give members a discount on a contribution in TNEW? From what I can tell, this can't be controlled by a pricing rule. Does anyone have a similar set up? How have you handled this for your organization?

Thanks,

Mike Dorsey

CRM Specialist

National WWI Museum and Memorial (Kansas City, MO)