I have my 4 Yakima mounts that I would sell you - sold my hardtop and they are just sitting here. Used some aluminum conduit for cross bars - it was a little too small, so I wrapped electrical tape around conduit until it was snug. You could find the bars and or mounts used on ebay.
Let me know if you are interested in the mounts, they are 'somewhat' inaccessable at this time, but I could get them with a bit of effort.
Pops