TWA. that's a knock off of the Rox. They can be found on fleabay as well. As long as they are made correctly/strong enough, they would do the same job. Also, if needed, you can add a stiffening rod since the lower end is drilled.
Rhodan, if you decide to go with a top clamp like pictured, they can be had on fleabay as well for a lot less $. Not as pretty, but.... Just measure the spacing of your bolt holes and check the specs of the offerings.

The 7/8 risers can be had a dime a dozen in many designs. From a block that you just bolt in to your lower clamp that will just raise the bar off the triple clamp to ones that will rise as well as move the bars back.

I had to go with Rox on my EV because I have the fat bars. Even then, the closest Rox made was smaller than my bars and I had to open up the upper clamp and shim the bottom one. I did use the stock top clamp which probably made the set up more rigid. See earlier pic.
Good luck,
Tom