Check out the local Mom & Pop gun stores. Often times they have it, or their distributors can get it. I used to get it this way from a Pawn Shop Buddy and another Mom & Pop before they died/ retired and closed.
My Last trip back from PA, I made some inquiries and using the Internet. Stopped just as I left PA and bought 10 bricks. In KY 5 more bricks and north of Knoxville another 10 bricks. Had a buddy in TX having difficulty finding it...he was down to 30 bricks.
Seems his two kids were really getting into this rimfire kid competition stuff and "dang kids, how come their guns shoot what mine like?".
Yeah my gas mileage was a little less on the return trip...must have been the Dynapoints, it could not have been the cases of Shotgun shells, handgun ammo or the few guns that followed me home.
Standard Velocity these Dynas work great. For the general all purpose high velocity the X22LR are great, and the PowerPoint (HP) are great, these are more readily avail here.
I inquired and searched for Rifle shooters, and figured these folks would have a line on Accurate .22 ammo. One M&P catered to these and Bulls-Eye folks. No shotgun stuff to speak of...but accuracy / long range shooters instead.
Maybe Tamara, or some of our other "will work for shell casings" folks can offer some distributors , or can in fact order for folks.
HTH
Steve