that’s 48 inches by 25 feet
I’d bet if you ask the supplier who they sell to in your area, that you can locate a theatrical/photo supplier that has those rolls as part of their stock, and sells by the foot to theatres and photographers.l
I found a site selling a couple of cheap 3xAA lights —- cost around $15 apiece. Might try these:
dx also has that one: http://www.dx.com/p/pange-230lm-3-mode-rotate-zooming-cool-white-flashlight-w-cree-xp-e-q5-green-3-x-aa-343427 ($13.28)
Found that one reviewed/modded at Small Sun ZY-123 mod
and that review led me to
http://www.dx.com/p/6-led-50lm-1-mode-white-light-flashlight-blue-3-x-aa-139374 (cheap, plastic pill, maybe moddable, under $5)
and more, dx at least has a decent page for AA lights that’s searchable
http://www.dx.com/p/small-sum-zy-515-60lm-led-white-flashlight-black-3-x-aa-190082 ($10)
http://www.dx.com/p/pange-rr1-led-150lm-1-mode-white-outdoor-flashlight-black-3-x-aa-353873 (about $6.59, can’t tell if it has a pill …)
okay, I can work with some of these 3xAA lights to make more amber lights easily enough.