I don't have a link, but the basic process is to find a convenient FFL licensee. There are websites which have lists, if you need them.
Then talk to them and see if they want to send their license out or if they can give you a copy. Make sure you discuss price, availability, etc. the way it goes with my guy is: I send his license to the seller. I tell my FFL I have a gun coming in a week or so to check his availability. Then I instruct the seller to ship. My FFL expects me to know when the package will get to him. When I know timing, I'm expected to arrange pickup and transfer. I call and make an appointment. For the transfer, he gets $15. He makes it clear that if he does more, that the fee is going up.
Then I go look for a gun.
Find the gun. Check it out. Communicate with the seller. Do some basic background check of the seller.
Negotiate price and terms with the seller.
Receive gun and inspect. Any issues, contact the seller BEFORE transferring.
Then transfer and enjoy.