does you clamp is like the one gefen is selling. ie a clamp that slides over a post on the base clamp? Some people have use yonex (toyozouki) clamp on Alpha machine. so there might different model available, you have to contact them.
This is my clamp. Toyo Zouki. Slides into tube. Gefen is selling essentially the same clamp except theirs slides over a shaft. Have you done business with them? Very strange website. Not set up for online ordering.
Yes i have bought tennis string from them. I called them and pay by visa. Their web site doesn t have a shopping cart. Im in canada and their ship here. You have to call them to make sure if their deliver to your country.