I have a brand new, never used, pair of Woodcraft black 3 inch riser clip ons to fit a 54mm fork. Beautifully manufactured in the USA! Was going to install on the Balabio, but I would have needed to fit all new hoses and move the instruments, plus lengthen the speedo drive.
My cost last month was $215.96. Offered at US$150, plus shipping by USPS - estimated at $16 based on my cost.