I have a standard Headliner (10mm) and standard Cheek Pads (30mm) for sale.  I had to purchase a 12mm Headliner and 40mm Cheek Pads in order to get my new RX-Q to fit.
Cost to me was $90 for these parts.  I'll let them go for $45 to anybody that wants a spare set for their helmet.
These have never been worn in anger or even tried on because I replaced them with as soon as the helmet arrived.  They will fit the following helmets:
-RX-7GP
-Corsair-V
-Quantum
-RX-Q
-Signet-Q