I am familiar with the challenges of loading safe, effective, rim fire cartridges on a production level and tho it has been done by handloaders, it would be a serious undertaking. Most ammunition makers -and CCI would be at the top of this list- won't sell primed cases to the general public in small lots. It is a shame that someone couldn't just order a few boxes for you as it is a regular stocking item for CCI.
Were I totally desperate, and wanted to shoot this cartridge, I would order a 22WMR (magnum) shell holder from Huntington Die Specialties in Oroville, California. Then, with a collet style bullet puller I would pull the bullet from a 22WMR case and discard the powder. I'd trim the case to 22WRF length. I would then load a 45 grain cast lead bullet over a full case of Trail Boss powder from Hodgdons and hope for the best. It would probably go "bang" without killing anyone or breaking anything but I'd test it in a good, strong 22 WMR (magnum) before I put it into that slide-shucker of yours.
But that's me. I'm not recommending you do it. Rimfire priming is usually applied to specific cannister powders and can cause weird things to happen when off-the-shelf smokeless is used.~Muir