For stagework Auke van Dokkum has at his site: http://www.cupsandballs.nl/
Glowing thread at a reasonable price on 220 yard spools.
Note however, it doesn't break as easily as Basting thread, but can be broken in the hands, with a bit more strain.
Aukes price is much cheaper then the one from the Camirand Academy..
At Aukes site look under: