Ship from multiple vendors by weight, dif shipping methods

Hello,

I am trying to figure out how to set my store up where I sell products from multiple vendors. I want each product to be associated with a vendor who has his own shipping carrier and by weight shipping rate. I would like the checkout section of my site to create a combined total of all vendors shipping costs. I would not like the customer to see that the products are being shipped from multiple vendors.

I have looked at some of the modules for this like this but have not seen one that account for different vendors using different shipping carriers.

Can someone please give me some advice?

Thanks