Well I tossed up a Simple Machines Forum for us here
http://hl4e.cryptoknight.org
You need to register to submit files, but should be able to download the ones I've done. Originally was putting every theme into 1 file, I've since decided to instead give each theme its own file. Themes.<themename>.user is how I'm naming them. HL seems to be ok with the two .'s in the filename.
I've still got 24 themes to extract from my big file, but I'm working on it.