Replacement power rack for MagnumForce K member

Hello, I need to replace the power rack in a 1970 Charger with a MagnumForce tube / coil over K-member. The pressure hose fitting was leaking so I tightened the fitting and then it stripped out

Does anyone know what rack they are and if I can buy it from say Summit racing or Flaming River rather than MagnumForce?

Any help is appreciated!