After reading about lead times, I emailed NV Aero about plans and he got right back to me that they are starting to catch up. I will order them soon anyway. I figure they are indispensable to my long-standing goal to build a KR1. A couple other things which somewhat fit that category would be wing skins, canopy. I'm sure there are others but these items would be hard to replace in the effort I think. I'm really happy to have heard back and look forward to my project (even if I dont get actually started for 6 more months or whatever).
chris