ceramic burner "brick" replacement source

we are servicing a kewanie c coiler, it has a gas conversion.  the burner deck has 120 burners - upshot through a tripple hole (three burner) brick (about the size possiblly slightly larger than a regular building brick)  with a tripod top , the info printed on the brick is   S I   131   the cap is a  AFC CO   R 6111

we need to replace 2 sets of these bricks ( 2 bricks & 6 tops)  we need info so we can order replacements in the chicago area,

current mfg

part #

distributor if known

thanks   john