Per justbill, posting this in what I hope is the correct category. justbill already answered the question, but though others might benefit from his knowledge, as did I.
My questions:

WayneP: At some point, wasn't there an "Advanced Search" option, that would let you filter by system type, etc.?

justbill: If you click on the search at the very top just below your usr name it comes up. I found it purely by accident

Thanks, justbill.