I make lots of designs and post them to Thingiverse. You can download and print your own. https://www.thingiverse.com/sbeecroft/designs
If you want one made by me (the Master of Plastic Artillery Munitions) email makerstevedotcom@gmail.com or check what’s for sale on Ebay here https://makersteve.com/for-sale/
3D Printed 120mm Mortar Shell
I am pretty proud of this one….
https://www.thingiverse.com/thing:3388786
3D Printed 155mm Piggy Bank – Life size Replica
https://www.thingiverse.com/thing:2767990
The Whiskey Stash V2 – The King of Bottle
https://www.thingiverse.com/thing:3034854
105MM Howitzer Shell HE D544 – Piggy Bank – Life size replica, 27 inches tall!
https://www.thingiverse.com/thing:2767990
155MM Howitzer Shell – Piggy Bank
https://www.thingiverse.com/thing:2865358
Cannon Bar Tap Version 2!
https://www.thingiverse.com/thing:2895794
USMC Cannon Bar Tap – Embedded Text
https://www.thingiverse.com/thing:2897408
USMC Cannon Bar Tap – Raised Text
https://www.thingiverse.com/thing:2897404