Update:
I made a entire new texture for the bat, this one looks way better in my opinion.

Someone asked me to also make the Harley Quinn Bat of Suicide Squad so here it is, I improvised a bit on the sides because there's not enough images out there to get a good reference except for the Good Night text.

Installation:
If you use FiveM like me you can just place the .ytd file here :
citizen\dlc_patchDay3NG\x64\models\cdimages\weapons\

For OpenIV it's:
update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\models\cdimages\weapons.rpf\

And here's the GTAF url of how I make my stuff,