We all feel your pain one way or another with the constant shortages.
If you look on the bright side, perhaps it's time you tried a different projectile. You may find something you like better than the Nos BT. Lots of great bullets out there nowadays that you can find on the shelves or online. When your favorite bullet is available again you can stock up, load it, and shoot again.
When I adjusted my thinking this way, I found I started shooting a lot more again. Which is a good thing, of course. I have a reloading journal with all my notes and recipes that allows me to change between different loads/recipes and/or substitutions of component for each rifle in my fleet.
I've had good luck with Nosler ABLR. They make a 168 grn. in .30 cal.