I haven't worked much with svn, and till now haven't got any of the svn files, but I can try to figure out how to do it.
I am checking out revision 5139 at this moment, which was described as base for V29. I'll post here, if/when I'm successful, so others who look for older versions could use this way of getting them.
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And it was possible to get such version. Having svn, I did checkout as described here:
http://forums.civfanatics.com/showpost.php?p=10651778&postcount=1
when asked for revision, I did not choose the HEAD one, but by the button "show log?" I found a revision that I wanted from the description of it. (I had to "show all" of them, I think I did not see 5139 at the beginning, there was only 100 last ones in default).
you have to then enter the revision number (5139 for V29)
After successful checkout, I copied all the content to another folder in "Mods" folder where my BTS is. And renamed it C2C-V29. This way, I have that version and I can now update separately to the newest one.
The mod was working for me, better than V31, however I still get MAF, I guess due to my Win XP limitations. Even when I have option /3GB enabled. There is something happening with video allocation...
Maybe there could be a list of revision numbers to get, for older versions, for people who previously had no C2C installed and the latest one does not work for them?