Azraels Armoury are out of stock, any one know who else that has them.
Try command elite hobbies. They may still have some o ring kits. Their for the p1 but they work with the other ones (I think?)
Have you tried a local bearings or engineering shop? I’ve brought specific o-rings non gel blaster related from engineering shops before just take the parts in and ask them to match it. Might work
A few on the Facebook groups have got replacements from bearing shops. Pretty sure 16mm ID x 2mm is what you need
Head to Supercheap auto with one of your toasted ones to match