Don't know if you're still looking for this, but I was able to throw it together in a few minutes. It's quite bare-bones, but it does what you want.
Weidu really isn't that scary if you use it for simple stuff like this.
singleweapon.zip
Edit: alternate download with a couple of fixes: https://drive.google.com/file/d/1rCPcsT5X5P0gzOKcmSg2XhEBQz1kwC4E/view?usp=sharing