The Systemic Web
A website of Systemic Ritual facilitators (who have completed the SRT) in the UK.
On this website you will find the drums that I use in my training groups. The site is in German, but the owners will respond to English when you mail them. You can discuss with them what the size of the drum should be and what kind of skin you want on it. I myself love the sound of the horse skins the best.