My father is a retired industrial sewing machine mechanic.
He has an array of needles.
794 size 250, 230, and 160.
About two dozen 10-packs of size 250.
One dozen 10-packs each of 230s and 160s.
$15 a pack; we can work on discounts for bulk orders
reply if interested.
(And if you happen to be in metro Phoenix area, you can can shop the needle selection yourself. There are other hard-to-finds in his shop.)