First off, welcome back. Don't stay away so long next time.
1) You'll have to check their site, I think you can but with Bob you can never tell.
2) I don't use one so I'll let one of the other members give some input.
3) No. On the UPO, the pearl is actually part of the bezel, NOT the insert. Some members have reported that their insert is part of the bezel so we may have different versions floating around. Mines was part of the bezel and The Zigmeister had to cut it off to put on a gen insert. Ofrei will not sell you just the insert, you have to buy the bezel which comes with the insert and the bezel cannot be used on the UPO.
See things haven't changed at all since you left.