Seeking 110v plug that is easy to grip
Home Depot is one of many sources for a larger plug that can be attached to existing wiring.



As noted in the photo, this is a three conductor type plug. Most vacuum cleaners are only two conductor. You can ignore the third connection if your machine is that type.

I did not search specifically for this larger plug in two conductor form for that reason. You may find that the store you select will have that type on the shelf.

These plugs are quite easy to grip. I've repaired two extension cords with these connectors and it's been working quite well.