Hotchkis (a very good susp. company IMO) will have a sway bar kit that replaces both front and rear available for our car by christmas, their rear bar does not have support, it is a 25.4mm (1 in) bar but it is hollow so it is not as stiff as a solid 25.4mm. Check out the rsx bars on their website, ours will be very similar.
I have had the front and rear Hotchkis sways on my EP for about 6 months they are the same part # as the RSX bars and you can buy them right now.

BTW I absolutely love them. Nice quality and superb handling.