We will be visiting Singapore then Malaysia in March. Fly to SIN, 5 nights. Will book a flight from SIN to PEN. Many direct every day. Will finalize arrangements for a driver through our Cameron Highlands hotel. Then get a driver to KL, from which we will depart. Not terribly expense... similar to Thailand pricing, for lodging and transport. Would look into the train but would have to book a ride to/from Ipoh to get to the highlands anyway, so will just take the drive all the way. All looks in order. Hope your itinerary works out also.