Yeah

I did ask about it and they said no, How old was your other Guinea pig when you got another? Did you introduce him to a baby?

xx
If you are prepared to go on a waiting list and travel as far as Sidmouth on the other end of Devon, Little Pip's Rehoming offers residential boar dating for a week, which is the safest form of boar bonding. Any resulting bond is as stable as a sow bond and fall-outs are very rare; what you get is all the benefit of a secure at minimal risk for you for the long term. This method also allows to bond boars of all ages, so you can neatly avoid the usual cause for fall-outs. It is your closest full boar dating rescue, but you will be in very safe and experienced hands there, so it may be well worth considering.
I have rehomed guinea pigs from rescues all over the country (South and Midwales, Scotland, Northeast England, West and South Yorkshire, Merseyside and Sussex as well as more locally), so I know that guinea pigs can travel well - even on the train, as I don't have a car.
Otherwise, you will have to bite the bullet one way or other. Finding a good vet (like I said, choosing a vet with practice in guinea pig neutering is cutting down a lot in terms of post-op risks!) or accepting that by speed dating a baby, there is a certain risk of problems when the youngster hits the teenage hormones between 4-14 months of age, but again, as the boys are not the same age and have liked each other at the beginning, the risk is well below 50%. Both ways have their advantages and their risks, or they come with the need to travel out of your neighbourhood. We can only discuss with you the various pros and cons, but the ultimate decision has to be yours.