We recently received many cans of 70 mm Space Shuttle handheld photography. We'd like to cut the film but we are running low on 70 mm Mylar sheets. Our old supplier no longer carries this size and checking elsewhere has only turned up one place  that sells them at a very high price. 8.50 for 25 sheets. That has us spending about $1,300 to sleeve this film. Any suggestions?

Dave