If I were in the market for an aluminum block, and I thought I wanted a KB block, I'd just hang on to my money and see how this whole situation with availability plays out.
If the lead time decreases to something under 6 months, and reports start coming in that people are regularly receiving their blocks with reasonable wait times, then I'd order one.
If that didn't pan out, I'd just have to accept it wasn't going to happen and then figure out an alternative direction.
No way I'm sending over 6k and waiting 18-24 months for a block.