Hi!
I am very sorry for your loss!
If you have the option to rescue date Coco at a good rescue, so he can choose who he gels with, it is worth finding new company. Even piggies that do not pine can become depressed and starved of attention/interaction over time.
Many rescues have got older boars and not just young ones, so it may be worth enquiring for an older companion boar.
The majority of recommended rescues will help re-bond bereaved piggies; they practice mandatory quarantine/vet care, so any piggy would be healthy and won't require a quarantine. The majority of our listed UK rescues offer dating at the rescue under expert supervision, so you come home only with a companion of acceptance has happened and are not risking to end up with two boars that do not get on.
Recommended good standard rescues UK:
Guinea Pig Rescue Centre Locator
Other countries:
Guinea Lynx :: Rescue Organizations
Here are our tips on what you can do for a bereaved guinea pig:
Looking After A Bereaved Guinea Pig
I am currently looking after an 8 year old bereaved sow for that reason - she seemed initially fine on her own, but gradually became very dependent on her owner's attention and somewhat depressed when nobody was around. The old lady has definitely perked up since her arrival!