Sir Bobby . . . . .

Could I only suspicion that any confusion might be that most any "googled" supply source is wanting to offer you a 68 ohm value of unit INSTEAD of the "old tyme " value of 75 ohms ?

Two more common 150 ohm values in parallel would give you that value and the wattage would only need to be 1 watt each to meet or exceed the original factory specified value.

Matter of fact . . .two of our new age 150 ohm metal film resistors rated at 2 watts each would fit the job beautifully . . and exceed.

(This illustration is NOT of the correct color coding . . . Red-Red-Brown . . . vice . . . Violet-Green-Black but you get the idea of the units nice conformal insulative casing.

Keep with that specified 75 ohm value, as this resistor is developing a "stacked" on bias supply value in ADDITION to the resistive "self biasing" being acquired with the use of resistors in the tubes cathodes and 1st grid circuitry.

73's de Edd