I'm looking for advice on where to find International lenders.

I would call the city and see what they say.

You can cold call to find off-market deals or consider expanding your search to get more opportunities. 

., I like how @John Karg is tossing the Internal Rate of Return components at you so you can get a true perspective of how that house is performing and can perform. 

@Simon Smith hi Simon, some call sunny isles “The Billionaires Beach” Miami is now home to the MOST millionaires and Centi Millionaires ($100M+) this does wonders for our market.

Also connecting with him on Facebook and his group called "AirBnb Masterminds".

Or do you just have to call the listing agent for each piece of land? 

I still watch his stuff and they're good videos but to call it a R.E. channel wouldn't be accurate

MLS, Zillow, Cold Calling/lead generating, Realtors, Mail Marketing, SEO/Online marketing...If you are going direct-to-owner (aka sourcing your own deals), you'll have the most and best options. 

Just make sure you ask your lender and tell them in writing you're doing that - they can technically call the note due (both my lenders said it was ok to have the title changed to an LLC) but this doesn't happen often.