Hi Scott,

Here is a site that is located in Huntington Beach, CA & have a number of different Technics style disks for sale...I am in no way associated with this site, I happened to find it in a Google search & noticed that the disks they had listed were the same that I saw for sale in a music store....
http://www.keyboardstoday.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=TN&Category_Code=KN6.5KS

As the 2600 uses SD, you may have to use the disks for the 7000, whereas my 2400 has a floppy drive & I can use the 6500 disks....it is interesting to see what's available.....

FlutteringBy