To get the actual image file (template) of an existing shirt or pants, you can use the following manual method:
for classic clothing was partly intended to slow down bot accounts from mass-uploading stolen content. Reporting Tools: Roblox Clothing Stealer
If you are looking to obtain a template for educational purposes or to create a modified version for personal use, here is how users typically "put together" or extract these pieces: Extracting Clothing Templates To get the actual image file (template) of
Directing users to websites where they paste a link to an item and receive the raw template file in return. Why People Use Them (and Why It’s Controversial) Uploading to Roblox To get the clothing back
Original creators often add watermarks to their templates to prevent others from claiming them as their own. Uploading to Roblox To get the clothing back onto your avatar or into a group: