Ullman is a great company to deal with. I have their seats in my H733 and love them. They are by far the most easily maintained and I believe they last longer. I have both new seats and older seats that I have reconditioned (some of the first Ullman’s to be seen stateside, 25+ years old ) Ullman has an office here in the US in Virginia but it isn’t uncommon to call the US number and speak directly with Carl Ullman the CEO in Sweden…. Give them a call and let him know what you are wanting to do. They are a tried and true company and stand behind their products… When it comes to suspension seats, you get what you pay for…