Default revision from frontend edit

I am using wcfm plugin to update my products custom post type from a frontend.

From frontend I have two options.

1. Draft – On click of draft, post status change to draft and publish product cant be access by anyone except loggedin user.
2. Submit – on this click changes directly reflect to product data.

My requirement.
Step 1. I want to edit my product from front-end.
Step 2. My original product remain published with old data and a draft will create with new data and also go for approval to admin.
Step 3. On approval from admin new changes reflect to original product details.