Well, hopefully everyone already knows about my extension piece (see my signature or the give-away thread hereabouts).
I'd been making kydex firesteel holders as well from the scraps - 3" x 1.2" folded over - but I'm out of material and don't have the funds to order more just now, hopefully soon if i sell enough of these extensions.
If you have a bit of kydex, a drill, a heat-gun, and a clamp, they're pretty easy to make yourself.
An alternative is to cut a 3" length from a 1.2" belt and drill holes on either side so that it folds around your firesteel or whathaveyou (the one below are drilled 3/4" o.c. on either end):
Kiah's sheaths, with the slots, allow for a lot of after-market attachments including the Tek-Lok and the AB-3 clip from Armory Plastics (
http://www.armoryplastics.com/belt-clip/) and other clip-attachments.
Armory Plastics also makes the holder for the Tops Piggyback firesteel:
http://www.topsknives.com/product_info.php?products_id=355
The intent is for users to drill a second hole to fit the spacing on their sheath and then cut it shorter if desired. I've been in contact with them (they also make the ESEE sheaths and some for Buck and Tops) and I know that they could make these holders to fit other firesteels or sharpeners, but they work in batches so you'd need to order quite a few.
For pouches, I know the ESEE pouch fit the previous GSO-5.1 sheath, as did the MOLLE-back. For other pouches, I'm usually lazy and either use cord to tie it on or cut a piece of kydex or leather to a suitable length (like those leather holders above) and drill holes where appropriate. It'd be awesome if Survive! was able to offer pouches through their webstore, but they have enough keeping up with the products they DO offer

Guy's company needs more revenue and employees... hence the starter!
There are a lot of kydex-benders around BF - Halestorm and Azwelke and Dave Brown and Mashed Cat as well as Kiah. Each and every one of them could certainly make accessories that would work, but my honest hope is that Survive! starts offering accessories like these direct through their website :thumbup: Kiah makes an awesome sheath, i know he can make these attachments as well.