[lolife99]

Here’s the part number for those spindles.
They are really nothing special.
They are standard c10 2.5” drop spindles with the balljoint and tie rod holes that fit the c20 trucks.

Here’s an idea,… buy new stock or drop 73-87 HD spindles (the ones for 1.25” rotors) and have the holes reamed for your c20 size balljoints and tie rods.
Same thing as what I have.
Finding a set of stock height c10 spindles should be easy.
Just make sure they are for the 1.25” rotors, because the aftermarket 6-lug rotors are 1.25” also.