C30 Disc brake spindles

[CantPutTheSmokeBack]

I'm replacing everything brake related on my 69 C30, and I figured I might as well upgrade to front disc brakes. Thing is, I've done some searching and many threads I've gone through come down to "just go buy a donor truck" which doesn't give me any answers. I cannot find a 1 ton donor around me. I've looked and the only 1 ton I can even find for sale is $9,000 as a running driving ramp truck. Even if I did find one, I would still want to be buying new rotors, pads, and calipers instead of reusing old used ones. So I would be buying a whole truck for just a couple parts.

I'm trying to find out if I need control arms and spindles, or will the disc spindles bolt to my control arms.

I'm also searching for a set of spindles. With the difference I've seen between C20 and C30 rotors, is there a difference between C20 and C30 spindles? I've been looking for a set of factory spindles for a C30 and cannot find any at all, new or used. I used to work at a parts house and talked to "the guy" who can find almost anything and he still came up blank. I've looked at all the big parts houses, looked online including just general google searches and cannot find any period. My best source is driving around to junk yards to see if they've got a donor truck I can pull them off of. Even at that, yards are few and far between for me.
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