Repair crumbling firebrick?

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jungmaria

Member
Hearth Supporter
Mar 31, 2008
4
Eastern Ontario
Anybody out there made or repaired their own firebrick in a cookstove? A couple months ago I found replacement firebricks for an old Findlay Oval, about $250. Since then Heartland (who has been making the Oval) has been bought by Aga and those same firebricks are now $850+

I've seen some people mention trying to repair them with refractory cement. Does it work? Any other suggestions?
 
What are the size of the firebrick? How many are there?