I think the cordovan tab that 3Rivers sells is made by Bateman. I have 3 Bateman cordovan tabs, use them all the time, and really like them, but I understand that if they don't fit your fingers they would not be the right ones to buy. I know that Don at Eagle Flight would fix you up with a good tab. I have never tried an EFA tab, but Don only produces the highest quality products, so I am confident his tabs are top of the line too. If Don says he can make a tab that will fit you and serve your needs well, trust him.
Allan