In case it hasn't already been found by you in Bangkok:
1) Speedboat Key is in Room 208 (the last room on 47's floor). It's on the table by the mini-bar.
2) The Wrench can still be found in the box beside the Gardener in the basement (but he is now an enforcer for security guards)
3) The Exterminator now carries a screwdriver with him.
4) A Hammer is still in the room where you can spray the Insecticide.
Extra: There are now 2 security cameras in the front side of the Security Room facing down either of the side areas (where players are most prone to be sneaking... Really nasty for SA/SO runs).