One possible solution out of this hole could be the following:
1. Lower material cost of the crafted upgrades.
2. Buff the non-Cartel Market pieces a bit to be better than those in the Cartel Market. It does not need to be a huge bump.
3. Learn from this situation in the future.
If all we get is #3, I'm content.
My preference would be #1. This would soothe the crafters plight as well.
#2 seems like a good idea but I fear the implementation would be complicated and require too much time to "fix" this in a timely manner.
And, I would be happy with #3 as well if that's all we got.