@Piggies&buns actually answered your questions - if someone takes the time to post an in depth reply please read it properly.
2 x 3 is simply too small for a pair which has clearly been stated many, many times.
I can link to many inappropriate cages listed as suitable for guinea pigs but it doesn't make it ok.
The minimum recommended space is not 'silly' it's necessary for the health and well being of your pets.
No guinea pig should be kept alone, so no size cage is appropriate for a single piggy - they need more space and a companion.
It has already been stated that it is unlikely you will be able to pair your boar with another boar as he has lived with sows. Pairing him with a baby sow does not mean they need less space. Babies quickly become adults, so the minimum cage guidelines still apply. It doesn't sound like taking on more guinea pigs right now would be a good idea.
To be honest it sounds like you have more piggies that you can really accommodate in good sized cages with proper companionship.
Sometimes it is better to admit you can't meet everyone's needs and consider surrendering an animal (or pair) to a good rescue. This will ensure it is re-homed responsibly with people who can adequately meet it's need and leave you free to enjoy the pets you have.