I added an extra 5 felt colours to my range last year, but neglected to update my rainbow felt packs to include the extra colours (tsk, tsk).
I sell two rainbow packs: a pack of mini squares, and a giant rainbow of full size squares. The mini rainbows will still include just 60 colours for a while (until I use up my current stock of 60-square packs) but the giant rainbows have now been updated to include all 65 colours! Hurrah!
They're available from my website, or my Etsy, Folksy or DaWanda shops.