I haven't had any problems with zoas and rics touching. Some it may take a couple days before they grow accustomed to each other, but eventually they will open and have no problems.
Can't actually find the add on the site I got them from. The person had told me he was about out and that was some time back. I gave the link to some pple that asked, but I can't find it now so probably is out. It was jsut an individual selling on a frag site.