old trapper

I have a model 99 in 243, this was a gun that was part of our family several years ago and was traded, fortunately I was able to get it back, bad news was that barrel was bent badly, I recently bought a barrel from Numerich but the threads were wrong. serial # 925xxx , it has model 99 near where front scope mount would be and it has model 99F on barrel, the bent barrel has (square threads) anyone know where I might find a replacement barrel?