I believe that the Standard Colibri would be considered the 'ultimate mouse fart .22' .Super Colibris, the ultimate mouse fart .22's.
I've set the notification alert for just about every kind of .22LR ammo listed on the MidwayUSA website. Since the beggining of the year, every once in a while a notice would pop up but it was always gone before I could order any. In the last two week, however, I've gotten more notifications from them than the last six months and more than once I was actually able to buy some before it was gone. They are still stuck with their one per customer limits, but I was able to piggyback the .22 ammo with centerfire ammo I needed, too, so the shipping was spread out over several different boxes of ammo and didn't kill the price.Will probably be sold out before you can place the order. But thanks for the heads up.
Note: I make .25acp 'colibri-type' cartridges by loading a primed empty case with a .25 air rifle pellet. Loads of fun in guns like Beretta tip-ups.