From where to where? In most cases easy and cheaper to do it yourself.

Go to a Thai consulate in Laos, Malaysia, Cambodia, etc. get another tourist visa.

No, at most a METV can get you nearly 9 months, if you do your last re-entry on or near the valid-until date and extend a final 30. But you could then go to a Thai consulate in neighbouring country (Laos, Malaysia, etc.) and apply for a single entry tourist visa, which if approved would get you another 60 days plus 30 extension.

For visa advice, best to state your nationality. For many (50 countries) the main options are: tourist visa 60 days + 30 day extension then go to another consulate and repeat (until they say "no") or enroll in an approved school to get an ED visa, or for longer term get non-immigrant visa (type-B with work permit for approved job, or type-O based on marriage to Thai or retirement age 50+ with proof of sufficient funds).

The "closer" option could be flying. Air Asia twice daily flights from U-Tapao airport to Udon Thani for around 800 baht. Then transfer to Nong Khai, bridge and Vientiane.

Myanmar (Yangon) would be another option

Go to the nearest Thai consulate (in Malaysia, Laos, Cambodia, etc.) and get a single entry tourist visa. That gets you 60 days and can be extended 30 days more at any immigration office. Six-month multiple entry tourist visa can only be obtained in your home country.

Bring a 4x6cm photo and 1900 baht. The required TM7 form is available on site.

418.pdf

Immigration office on Koh Samui, short ride from Big Buddha pier. Go early don't wait until last day when it will be busy due to Songkran closures.

Take a train from Surat Thani to Butterworth (Malaysia) then quick ferry to Penang.