Contact Dawn and see if they already have them listed. (my catalog from last year doesn't show them) If not, just give her the qty and dimensions - ID, OD and thickness - and they should be able to put together a set.
If they don't have them listed, and you don't have a digital caliper I'll measure mine. Just shoot me a pm.
Does it need the upgrade? I've had one for 3 years and use it all the time for redfish and false albacore and have never had a complaint about the drag. It stays smooth and consistent all day long. If it does I'll take two sets, let me know.