Back in the dark ages, the military had a nifty hand-cranked doohickey that would load half-moon clips. A friend of mine had managed to acquire one in the '50s, along with several ammo cans of half-moon clips. About once a month I'd spend a couple hours loading clips during a visit.
It was wonderful, I could load a thousand rounds into clips in an afternoon, with time to drink coffee and shoot the breeze. The problem was that it didn't unload the clips. Eventually I went to a 1911 as my primary shooter.
You might want to watch for one at gun shows or in your older shooting-buddies garages. There were at least two in Lincoln NE in 1994, so they're still around.