What's the rule on IDL? My wife and I will be renting a bike out of Chaing Main and we have no problem getting an IDL. However, my brother-in-law is coming and he is from Colombia. An IDL is over $100 in Colombia, which is a lot of $$ for him....(he's already probably in to much just getting to Thailand!). Are IDLs needed to rent a bike? Can one be had in Thailand?