collect logo from several retailer

This is a simple straightforward project. I need to collect the logo for 860 different retailers like Buy, Walmart, NewEgg, etc... I'll provide a spreadsheet listing these websites. 1) About naming convention, use retailer name, replace these characters [ _ , ' , . , " ] with underscore e.g. [login to view URL] -> [login to view URL] 2) About the logo size, use 300x200px with white background, no space margin needed when resizing and cropping the image. store as jpg 100% quality.