Step 1. Copy and Paste the website Url into this website known as steamworkshopdownloader.io
and no it's not sketchy cause I used it to fix some models that were broken
Also you can do the same with the props
Step 2. Manually download it to sfm
you would have to Copy and Paste the files to the workshop file in sfm
If you don't know where it is for some people you would have to go to program files 64, steam, steamapps,common,source filmmaker, game, workshop
Step 3. Copy and paste the items in the right spot and that should fix the textures