You can buy the 60 day SETV visa for ฿1,900 In Malaysia then get it extended in Thailand at your local immigration office for 30 days at a cost of ฿1,900….I’m guessing this is the type of visa you want to buy
I took me 1 week to get my METV, it goes live the moment you receive the visa, so its important to buy your ticket to thailand asap so you can maximize the METV