There may be a utility that does this but I'm not aware of one. You could try dragging the drives out of the /Volumes folder to the right side of your dock - I've got my /Volumes folder in my dock so when I click it, it fans out in stack format with the volumes listed there
To get to the /Volumes folder
Finder>Go>Go to Folder, enter /Volumes, and a Finder window will open it