I had the same problem with the 3000GT inserts for the front suspension mod. I waiting something like 6mo before they were available again. You just need to be patient, but I understand that you need these now due to moving.
I'd say just go with the parts store units for now just to get going and once you've moved to the new place, wait it out there.
I'm moving to the country and readily getting vehicles repaired will be a hardship. Currently I live in town, so of course it's much easier to go to the shop. I would rather get the repair done and not have to worry about it again.
Yeah, that happened to me too. It's not just RA, but also from Amazon, and Summit. This isn't a vendor issue, but rather a manufacturer issue at time of packaging. I went through something like 7 returns with various online retailers before I got the "right" unit. This is where I ended up flipping the ball joint over on my UCA.
This was when I discovered that both arms were identical to each other and that they were just left / right only because of which way the ball joint was pushed through.
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And here it is where I got it fixed.
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I honestly wouldn't be surprised if Bill uses AutoZone or O'Reilly's units at significantly marked up pricing.