I agree with everyone, because they have met and had a fight before it could be a tough bond process.
You will need someone with more experience and know what to look for if somebun gets stressed or when a fight is about to break out.
Have you tried ALL the rescues you could possibly travel to for help?
You might have to travel abit further than your area, but atleast they can be bonded.
Im not an expert but the two buns need to be bonded in an area they havent been before, you will need 48 hours to watch them, that means through the night too! So set yourself up a sleeping area near them. Theres going to be chasing and nipping, but as soon as it looks or turns into a fight you need to seperate them and if the chasing, nipping or humping gets too much for a bun you need to stop the other bun, but try not to seperate them. Your buns will need to be in the small space for atleast a week, until you feel comfortable increasing their space SLOWLY.
You can bond them in a dog crate and have a pen to attach to it to increase their space gradually as the bond goes on.
If and when you start the bonding please start a thread and keep us updated so we can help and give you advice while they are bonding.
Im sure someone more experience will be able to help and give you advice too soon. :wave: