Data.IntMap.findMax is missing

recently I've switched from "Data.Map.Map Int" to "Data.IntMap.IntMap", but I was disappointed because I did not find a function that would yield the maximum key faster than in linear time, i.e. O(log n). In fact the whole "Min/Max" section is missing in Data.IntMap (resp. Data.IntSet) compared to Data.Map (resp. Data.Set). (The section "Indexed" is also only in Data.Map.) Would somebody care to fix this? Cheers Christian