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I've check the list of downloads at www.7dana.com, but didn't see Seven Blue. This may be the authour, it may not be. You can go check over at www.7dana.com
Also, do you have the original download somewhere so that you can just re-extract the files you need and upload to the server?
I don't keep many themes on hand since I havn't used all that many over the past couple years, but I do have a ton of modules! Otherwise, you may have lucked out and I would have had a copy for you.
There should also be a few XOOPS powered site that are still dedicated to XOOPS themes. A thourough search on google might lead you in the right direction. Just use XOOPS themes for a search term and you will get quite a few results.
Hope this helps some.