If you take requests could you get Ephialtes' Weapon_Shotgun and Kaje's Weapon_Sniper_Rifle?
I found out Gamemode_zombie has a built-in ammo mod that works with Gun, Guns Akimbo, Minigun, RocketL and Kaje's Sniper rifle (Weapon_Sniper_Rifle).
Nevermind, found them all.
But I did find the add-ons in the OP's post very useful.