Can I apply for the Type O Visa in Thailand as a US citizen residing in Ecuador, and do I need a police report from Ecuador or the US?

I'm a US citizen that has been living in Ecuador for over 4 years. I'd like to move to Thailand later this year. I understand being over 50, I can deposit 800k baht, along with a police report, etc. I was hoping I could do the Visa process here in Ecuador, but I don't live near the Embassy in Quito, and they don't respond to my inquires. So, I guess my question is, can the Type O Visa (I believe) be done in Thailand, or must I return to the US? Also, I'm not sure if I need a police report from Ecuador or the US, since my passport shows my residency in Ecuador. Thanks for any insight.