Modern Speed Loader?
 

I will admit ahead of time to being a heretic and an infidel - I am a shooter, not a collector - but I was wondering if any one made a magazine speed loader (similar to HKS speedloaders) for the luger magazines?

Yes,

It's called the 'loading tool' and came standard with most Lugers :D

But seriously, it works pretty well. You just yank the spring down and can almoust pour the rounds in.