I'm not aware of one. Additionally, 'vendors' make it more complicated... Who is paying the shipping cost? If the vendors are paying, they would need their own shippo accounts. If you are paying, and it's your shippo account, then note that the rating (shipping cost) would be based on your origination address, not the vendor's. Additionally, a cart can contain products from multiple vendors. If the plugin needs to use vendor's shippo account, it would need to be able to handle that, as well as aggregating rates for the similar shipping carrier/method (e.g. UPS/Ground). But it's then complicated if vendor A uses only UPS, and vendor B uses only FedEx. nopCommerce does not support selecting different carrier/method per cart item. - the shipping plugins (built-in and in marketplace) that I'm aware of only support one account configuration and can't handle the multi-vendor issues.
thanks, in my case i would be paying the shipping for the vendor. i would assume that you could set the address from/to to get the correct shipping cost.