Yup it was Ullman in South Africa that did our tramps. There are many pictures of our boat on our blog (www svpartyoffive com). We have since sold the boat, or I would take a recent picture of them. After 5 years in the Caribbean the trampolines looked like brand new. However, we did have to replace the lashing lines after 4 years.
Frankly, I think the super tramp material is one of the best options. I have been on a lot of trampolines and found that super tramp is the most comfortable to walk on or lay on. It has very little stretch or bounce so it offers great support. The little holes also feel great on the feet and are small enough that you don't worry about your toes going through them.