I picked up a complete 12 ga. ejector forend for a Sterlingworth off EBay for ten bucks early this year. It was in very good condition and went right onto one of my Sterlingworth Ejector guns. No fitting required. Did have to ultrasonic clean it because of a lot of crud in the works. Now it just needs an set of 32" barrels to finish the outfit.

EBay is what you make it sometime. Value if you know what it is and th seller doesn't or if they can't spell worth a dime.