Flat spacers would have been fine. You're paying for the Bora name. The only reason everyone cries about hub centric is they don't realize the bulge lugs are what actually centers the wheel, the hub ring only helps get you there.
I ordered my truck back in 21 because I had the option to after the dealer couldn't find what I was looking for. I was able to order the 6.2L in the Custom Trail Boss trim and ordered the safety confidence package that includes the steering wheel audio controls as well as crash alert and pedestrian alert. I saw from your other thread you weren't able to order because ordering for regular cabs stopped months ago. I've been tempted by the 0% for 60 month financing GM has currently but I'd have to take what is in stock and can't find a diesel in the bright blue color because it too was built out months ago.