The IDW comics introduced new characters, uniforms and new equipment that you may wish to replicate.

Egon is seen wearing a much bulkier version of the pack, the boson dart pack.

Peter is seen using a proton cannon. This weapon is actually an updated call back to a weapon used in Real Ghostbusters

Janine and Winston are seen wearing a smaller version of the proton pack, known as the compact pack. The thrower is arm mounted. Throughout the course of the comics, the pack adds an additional arm mounted thrower, one for boson darts, one for standard stream.

Winston also uses a proton pistol, which appears to be attached to his proton pack and is a secondary gun to the standard neutrona wand

This is also used by Melanie Ortiz in the The New Ghostbusters