Hi Pope,
Here are a couple of links where you can get fireseals. The hagar below looks exactly like the stuff I purchased from AMSEC - only cheaper.
http://www.doorwaysplus.com/our-prod...cent-fire-seal
Another option is an ES982 (maybe also ES985) from here
http://www.lorientna.com/products/ga...991-and-es982/
I also managed to find a pemco S88D17 smoke seal (to use in addition to the fire seals) on ebay for less than $15 shipped.