"Survivor" Foam Blaster Upgrades has parts for dart making, external upgrades, and performance parts for your blasters. Among them is a Direct Plunger System for the Longstrike! I'm a fan of some of the names they've got for these darts. The "Soulless" and "Headless" foam rods are among some of the HvZ-centered focus of this new lineup from Xplorer.
I'll have more info on this lineup later. Maybe even some reviews!