Hi, I'm experienced web developer and able to help you to make this opencart module. Please describe me over chat for more detail about vendor attribute & multiscrapper.
I have alot of experienced in developing web as at the past I was a technical manager of an affiliate company. I'm able to make a complicated web apps and combine with mobile apps with a good structure. Let's talk more detail over chat.
Please feel free to check my portfolio in my profile https://www.freelancer.com/u/teguhpanjaitan.html so you get a clear view about me.
Hopefully I can see your positive response over chat and don't hesitate to ask me something about me/project requirement if you need.
Regards,
Teguh