Try two new pouches for each. Most of us have boxes full of pouches and cage accessories, toys. You wouldn't need to order them online. A trip to the fabric store for some fleece, a pair of scissors and tying some knots could work... then again I'm realizing you said 'bonding pouch' which are usually zippered. Maybe velcro? (my girls no longer need an enclosure and will hang out in an open top pouch...sorry I didn't notice what you'd said at first.)
Do you have the new glider separate and in her own cage now that she's home? If so are their cages very close to each other? He could be reacting to her being in the home and just really eager to get out there and interact with another glider. Once their vet checks are clear in a couple weeks he'll get his chance!