Small-Medium sized bomb models

I really need a good small bomb model and a medium size sphere, it could be a model out there, or an actual bomb model in HL2/Gmod.
I’m currently working on a beta swep that’s a type of cluster bomb, I’ve tried SMG1 grenades, but those fail because they float, I’ve tried the combine ball ammo, but those look fucking ugly.
So I’m requesting a link to some models out there (Don’t you dare give me a large pack like PHX), or some models that you might of released so you can help a person in need.
I’ll include you in the credits of my swep (Like that’s a big of a deal), if you want.
Your help is appreciated.