Show Sold Items Per Vendor

I want to be able to show the amount of items each vendor has sold on both:

1) The front page, in a list format, showing the top 10 vendors and their total sales

2) On the product page (or vendor page) under the vendor logo next to the name (instead of displaying the # of feedback received)

I use the vendor page pro addon already.

Is there something out there that would allow me to show this?

I am afraid there is no way to receive such reports on the clean installation without additional code modification.