AF1 has a used Sport City 125 luggage rack for $10.
http://www.af1racing.com/store/Scrip...dCategory=2577
Top Case rack:
http://www.af1racing.com/store/Scrip...idproduct=8764
I would see if the local dealer will throw in the case to sweeten the deal or at least get you the mount and case kit at cost. The OEM Givi cases are quick release and very handy.