WOW - sorry but your post was totally difficult to read - so many extra pronouns I had trouble following your thoughts.
If you find a second glider - you need to do a 30 day quarantine with a health check and fecal testing on the new glider and a follow up fecal test 30 days later to make sure your new glider is not bringing any parasite issues into your home to share with Buchy Boy.
If Buchy Boy has not had a well check up and fecal testing done since you brought him home this also needs to be done BEFORE you get a second glider. This is especially important since you do not know the cause of his former cage mate's death. If he has not been neutered you also need to have that done BEFORE you introduce a female.
Read more information in the Gliderpedia (button in the forum header) about quarantine and introductions.