I designed one just for the Shield Plus mags to print. It is on Thingiverse under roc2it. Prints great and easy. Cost almost nothing to print. The file is free to download. Cheers! If you print it let me know what ya think!
If you would like to print my mag loader design I am on thingiverse under roc2it. It works great. I would like some feedback if you do print it though. I am biased.. lol