Foreign Insurance cert
  https://longstay.tgia.org/document/foreign_insurance_certificate.pdf

Insurance company list
  https://longstay.tgia.org/companiesoa


Falcon
  https://www.falconinsurance.co.th/en/accident-health/ismart-health-oa 
  22,765bht/yr $641

Mister Prakan O-A search
  https://misterprakan.com/th/lp/main?lg=en&p=healthenvisa&affid=AG3007