Rosco 14579 Channel-Style Glass Pattern Holder - BG Size - Shakespeare and 360Q
Details
Glass Gobos or B sized metal gobos (trim to fit)
BG Size (79mm x 64.5mm image area). Maximum gobo thickness is 2.2mm.
For use in:
Altman Shakespeare, 360Q
(Note: As of June 2001, BG size glass gobos are made by special order only. Std B Size (86mm) is available from stock)
Rosco manufactures gobos holders for use in some of the most popular lighting fixtures. However, given the incredibly wide range of fixtures available around the world, there are many instances where Rosco does not have a holder available. In that instance, you should contact the manufacturer of the specific fixture for their recommendations. Consult the fixture specifications page to determine what size gobo is required for your luminaire and whether one of Rosco's gobo holders will work.
Rosco 14579 Channel-Style Glass Pattern Holder - BG Size - Shakespeare and 360Q (Rosco 250145790000) 
Found a hard to find part and it was still affordable. The payment process was a bit of a problem, the system either wasn't working properly or it needs a bit of clarification on the instructions. I did get it paid for and the delivery was fast. Overall satisfied with this purchase.
always easy
good