Alternatively I designed a new Impact magazine!!! FX Pellet Care Magazine from Denmark. - you can DIY print them yourselves ! Available in .177 .22 and .25 These are specially optimized for pellets. There will be a with flip cover version available soon. Same shape but with traditional Fx style rotor style (as the last image) If you join one of the 3d printing groups on facebook there are people dying to find something reasonable to print.
I am currently editing the last part of how to print and finish the magazine after printing video. Including DIY O-ring and DIY spring.