You may want to mention what type of spindles you're looking for- drum brake (9 or 10"), four piston KH disc, or the later model single piston disc; since each one is different. FWIW, the later model single piston disc is the only one where a drop spindle is offered as far as I know.
If the late ones are what you're looking for, this thread was posted recently:
Too low
Since he's looking to get rid of them, you might try PMing the OP to see if he's looking to sell or trade his old ones.