I have a couple sets of Woodcraft clipons on hand in 33 mm and 35 mm. These have the silver bar. The black bars are currently on back order but if you would like that instead let me know and I can get it on order. You can also place the order directly on my website also.
I am personally using a set of them on my Honda CB360t project. The 33 and 35 mms I currently have on hand in Concord NC.
Cost is 154.99 shipped to the lower 48 states. AK an HI will be actual shipping. Please PM me your zip and I will get a shipping quote for you. I prefer all orders to be placed through my site HERE I accept any major credit card, paypal, and cash if you are local. If you are in NC, there is sales tax.
If you would like any other size, they can be found on my website HERE. They go as low as 29mm. We can have custom sizes made, but I am not sure if they can make any smaller then 29mm. But, if you want a smaller size let me know I will find out for you. There is a fee for one off custom sizes.
As you can see in the image, to achieve the small diameter for the 33mm fork tubes, there is a machined aluminum split insert. The 35mm fork tubes don't need this.