Well, that there is the problem, innit?
The last people to make a Rimfire cartridge commercially, went on to more profitable things some time back.
Navy Arms imported and sold quite a bit of it. It was made in Brazil, to order for Navy Arms. And that was the last of it.
Most of the world does not give enough of a damn about obsolete rimfire ammo to make it worth while. So the ammo makers stay away in droves.
Despite the apparent amount of interest around this forum, in .32 rimfire, it is pretty much only because of the two things coming together that we get so much traffic on it. The first is that the Canadian Prescribed Antique laws make these mostly crappy and cheap pistols available without paperwork to anyone without a PAL, and the second being that, well, there is essentially about 2/3 of the guys in the country that are interested, are here on the forum on a more or less regular basis. It's not a bunch of guys, all added together.
So, it's drill out the centerfire cases, buy the HC Concepts kit (where THEY drilled out the cases, or made them from scratch), or do without.
My bet is that we don't see any .32 rimfire ammo being made really soon, if ever. Even if it is made, it still has to be run through the process of getting it added to the list of legal to import ammo's. Then a distributor has to be convinced that the Canadian market is worth selling IN to (case in point, Aquila rimfire ammo, you see much of that on the shelves?). You are even less likely to see the other rimfire cals come back into production, IMO.
And before anyone trots out the new 17Super Magnum, the only reason IT exists at all, wa sthat the cartridge cases that it was based upon, were already in production, as power nailer cartridges.
Then of course, will come the almost inevitable backlash of consumers whingeing about the price, that it does not restore the shine to their corroded barrels, or any of the other things that dudes will whine about, with new ammo.
And, back to the generally old, clapped out, none too high quality to behgin with guns, would YOU advise a company to start up a new product line based on them as your market, if you were the company lawyer? Nuh uhh! No way Jose!
All while the makers are able to sell every bit of .22 rimfire ammo they can make, at premium prices.
So, nope, don't see it happening.
As to somebody tooling up to sell formed cases, you still need to prime them. You may be willing to try it, I don't need to, to know that it would cause me more headaches than benefits. Sell primed cases for old guns that you have no control over the loads used... too much liability exposure again, methinks. Guys have tried to get .22 rimfire cases, supplies are...limited, if they can be got at all.
Cheers
Trev