couple of questions

I was checking out the rear window trim the other day on my 68 Barracuda fastback and found it loose in spots. So I bought a window trim tool and started to remove some of the trim to see why it was loose. It appears the clips were damage previously or just plain rusted the ends.

Number 1 question: Is there a way to replace them with out removing the glass and gasket.I'm betting I'll have to but I just want to confirm it.
It's a shame if I do the glass and gasket are in good condition.

Question#2: If I have to remove the glass what's the best way to store it.
Lay it flat or make a frame of some sort and store it on end. If I have to
this probably won't be done until painting time comes.

thanks for any answers

Tom