I've never had a strut suspension to bits, and I've seen a few threads about strut top issues, but I'm not sure I'd fire the parts cannon just yet. Having it still make the noise when it's on jackstands makes me think it's not load-related, which isn't what I'd expect for either a strut top or a TRE. I'm also noticing you said both tie rods seemed like they were making the noise. Maybe both outer TREs failed prematurely, at the same time, or the noise is transferring really well from one side to the other, but noise on both sides of the rack has me wondering about the rack.
I'd pop the outer TREs out of the knuckles and repeat your jackstand steering test. If it doesn't make the noise, steer the knuckles by hand to check the strut tops, and if those seem fine, check it again with one tie rod, then the other. If on the other hand the steering still makes the noise when it's not moving the knuckles, that suggests an issue with the rack, steering shaft U joints or rag, steering transfer box whatsit, or possibly the column. I would double-check the rack bushings, too, though again that seems like a long shot given how little load they're under with the truck in the air. If the feel-stuff-while-it-makes-the-noise test fails, disconnect things one by one until you find the problem. Obviously be mindful of the clockspring while doing this. I think the shafts are keyed so you can't reinstall them cockeyed, but I would still put a paint pen mark on them before pulling them apart just to be safe.