Hi all cruising craigs list this morning and what did I find.
Multiple pallets of FB for sale! .30 cents a brick by the pallet ($200) or $1.00 brick for less.
Good for continuous duty at 1742 F this will work in a rmh If you can't afford ceramic fiber board & blanket then this is the thing to make your core and riser from!
EDIT) I see ten months ago I posted this same add and they were .50 cents each then... price is falling!
You can't get the insulating firebrick at Tractor Supply etc.; they are normally around $5 each from industry suppliers. Wish I was nearer... though I have scored discarded kilns which contain irregular insulated firebrick.