Hi guys, First real thread ive started on here so here goes. I have the opportunity to buy a pair of pretty shabby Bottle rockets, the lenses are done for but i know replacements are still readily available. The frames however are 90% good with no massive defects but an "O" is missing off one off the arms. Never having owned a pair before is there a frame type out there (Im thinking Flak Jacket) with the same size "O" i can use for a replacement? Thanks in advance.