yes, use an agent in Cambodia,( try Cina travel on street 130 near riverside) cost is $60 if in Phnom Penh , some request you have at least $1,000 in a bank account
LOL while a No o extension requires 800,000 in the bank ( $23,000) or a monthly pension of ONLY 65,000 baht .year ($23,000 /year) and only cost ya 1,900 baht.
cant see why anyone would spend the $$ for a ltr
can u imagine spending 50,000 baht an dying after 2-3 years?