they are available, they trade with quite thin b/a spread and they are european options, that is, they cant be exercised prior to expiry. checkout www.eurexchange.com for further info.
As a sidenote : Funny enough, product development manager of EUREX couldn´t tell me anything about DAX LEAPS....Ha, ha, ha....
i am sure you were talking with the wrong person. dax options trade in the range of hundred thousands lots per day. huge revenue stream for eurex and exceptional trading vehicle for the major institutions throughout europe and abroad.