Virtual DJ is a popular DJ software, and there are many talented designers who create custom skins for it. The "Mix Lab 3.1" skin you mentioned seems to be a popular one.
( Right click and copy the link then use on browser) virtual dj skin mix lab 3.1 free download
Please be aware that links to download the skin might expire or be removed over time. Virtual DJ is a popular DJ software, and
If none of these options work, you can also try searching on other file-sharing platforms, YouTube, or DJ forums. specifically the "Mix Lab 3.1" skin
xxxxxxxx will be updated. Make sure check link Validity Before download
You're looking for a Virtual DJ skin, specifically the "Mix Lab 3.1" skin, and you'd like it for free.
https://www.dropbox.com/s/xxxxxxxx/ MixLab31.zip?dl=0