Hi guys , there are some intersting units here , it's a french guy who made them for the mod PDER.You could maybe ask him to use his units for RR/RC? Those are early units , and I find them quite awesome!

Here you are:

French forum : http://www.mundusbellicus.fr/forum/showthread.php?t=350

On TWC : http://www.twcenter.net/forums/showthread.php?t=330812