Im a visa run agent on Koh Tao sending many of my customers to Malaysia for Tourist visas. Penang is cool to visit and
@Jim **************
is a very nice, honest and helpful guy down there, yes onward flight is necessary and 90 days is fine. Kota Barhu is another good option,
@Herbert ******
runs a fast and easy trip there from Samui/ Surathanni. KL is the hardest of the 3 options as they require a bit more paperwork.