I did exactly the same thing for loose collection. I was the only way to be defo sure of original weapons and no funny business.
When I started to collect loose figures again in pre internet days, finding original weapons was hard. There were defo more repros out there and most people were happy to state so, however now on ebay I find it amazing that almost every figure auction 'has it's original weapon'
hmmmmmmmmm
Anyways, if it helps, I do have two beaters where the bubble have smashed sliced off the top, but the figures not removed. I can vouch for these two as they were sealed until a nasty incident at Collectormaina led to those and a Han Carb to be smashed through the bubbles.
I've also got baggies of Stormtopper, Hoth Stormtrooper, Nien Nunb and a Gammorean Guard if that helps too?
Regards,
Dave.