I don't believe the ILRCO round ever reached the market. Winchester made it on the request of the Illinois Arms Company, who had designed an automatic carbine with an enormous drum magazine around the .22LR cartridge length, and found that outside lubrication made it too prone to stoppages. I think they pinned their main hopes on a full auto version for law enforcement, and it is hard to think of a law that that exactly fits. Even in an exceedingly violent riot, there are always going to be a few journalists or Ivy League sightseers in the crowd.
Although the .22WCF is usually considered obsolete, CCI made some not long ago. At a guess it would be expensive and hard to find. They loaded it with a jacketed bullet although they claimed only 1300ft./sec., and said it wasn't recommended for pistols as a result, since they often had tighter bore dimensions. That seems curious logic. I can remember when Eley High Velocity .22LR, in the 60s, claimed a muzzle velocity of 1400ft./sec. with a 40gr. solid or 37gr. hollow point bullet of conventional LR design. Their claimed velocity has since reduced, and I don't know whether it was a genuine design change or driven by the introduction of the hobby-priced chronograph. But the original version was barely detectably inferior in accuracy, with the Brno .22 sporter I bought in 1970, to the target rounds they still sell around the world. I can't see why CCI needed to go jacketed, which possibly killed the chances of manufacturers bring out new .22WRF firearms.