yeah i have one on my 01 ex. Its from progress tho, and i would never install a sway bar without one again. Take a little work to put on, IE you have to drill a coupld holes and thread those holes, but over all VERY WORTH IT.
If you start researching about using ITR rear sway bars on Civics and Integras, you'll see tons of people talking about combining rear subframe braces like these with large rear sway bars. If you're going to go larger than 17mm in the rear, I would consider a brace like this a must-have.