I saw a notation there that some parts of the kit (unspecified) may be available as "seconds".
That could be an option- piece part it.
Assuming that a person ditches the corner pieces in favor of aluminum or steel anyway, pretty much all that remains that is of interest are the base plate, build plate support and extruder pieces (which are themselves quite easily printed !).
Doesn't help with the 12 volt PSU though.
I have noticed a lot of things that seem to be chronically sold out on their website.
Is this a labor shortage issue or are they just not adequately re-stocking?
For common items (bearings, idlers, lead screws, cables) that only forces users to other websites and vendors.