Can't speak to the pump.
Nealey plugs have a great reputation, as do their inexpensive and compact tools.
I'm not a fan of the screwdriver-style handle on the Nealey tools, but that's a personal thing. While larger (all not that much larger if you remove the needles for storage), I like the robust T-handles on the Safety Seal kit, which also has great plugs.
Edit to add: Both Nealey and Safety Seal plugs do not require separate glue (which as @Spec mentioned below) many other options need.
Nealey plugs have a great reputation, as do their inexpensive and compact tools.
I'm not a fan of the screwdriver-style handle on the Nealey tools, but that's a personal thing. While larger (all not that much larger if you remove the needles for storage), I like the robust T-handles on the Safety Seal kit, which also has great plugs.
Edit to add: Both Nealey and Safety Seal plugs do not require separate glue (which as @Spec mentioned below) many other options need.