I'm sorry to hear of the primer situation, however, I popped into the local Sportsman's Warehouse yesterday and they had plenty. I bought a brick of CCI 200 LRP. But to answer your question. Yes you can bush the primer pocket to accept the small primer. In fact, several years you could buy the sleeves. I actually have a few left. I wish you luck.
Bill

Yes unfortunately anything in the US does me no good. Ammunition and all of its components are highly restricted for export out of the US. The result is there are essentially two importers in canada which supply all the retail sellers. Once those two importers are out of stock every retailer will be in the same boat.

I have a business building big bore air rifles. A customer sent me three barrels to be chambered with slugs in them seated by his bolt. US customs held the barrels and removed the slugs then sent them on to me. Air rifle components are not regulated but the slugs were considered to be ammunition components. 

Sad but true

Back during WWII, some folks used small primers by popping out the anvils from fired LR primers, putting the small primer inside and seating in the case.  The seating operation flattened the indent.   I have not tried this, however.  Might work for you.

CHRIS
RGChristensen