Depends on your definition of small
I would call a 50 round hopper small, and you aren't going to find an electric one other than I think one 3d printed design that requires you to sacrifice an electric hopper for the workings
Are you experiencing a lot of chops or worrying about the potential due to lack of eyes in mechanical guns?
Just an electric hopper isn't going to prevent chopping, avoid electric agitated as they just save you from having to occasionally shake a gravity hopper
A chop occurs when the ball is part way into the breach as the bolt goes forward
If a gravity hopper jams at the top of the feedneck then that in itself would not cause a chop, you would have to shoot quicker then gravity drops each ball, or there would need to be a jam that releases a fraction before the bolt goes forward and the ball is part way in
You would need a force feed hopper to push the ball into place, and also not shoot faster
A compromise is the shelf type gravity hopper such as the Proto primo
The shelf effectively extends the feedneck and has two feed lines ready to avoid the stall of a momentary jam
Halo too is a decent force feed that does the job, keeping up with usable electronic bps rates and easily mechanical bps rates