heater repair

[Ted]

Trying to find where I can find parts.  Front is stamped Humphrey-RadiantFire Patiented.  Top, on the back, there is Y6.  No other markings.  Height - at the front, 16.5 inches; at the back, 21.5 inches; width - 19.5 inches; depth - 8.5 inches.  Measurements are approximates.  Would like to restore and use.  Value would be interesting but not useful.  Need burner guts, fire brick there but cracked.
I hope someone can help and they can email me.  I'm very computer stupid.  Thanks.  Ted.