It may be cheaper to buy other nic cards that have standard rj45. Most times you would buy a card like that to put in optical SFP since there are many variations based on fiber type.
Also be very sure to read the fine print in the manuals for these cards. I have found devices that refuse to support copper SFP even though there really is no technical reason they should not work. It is also very important to get SFP that the card will accept. HP and many other vendors restrict which SFP they allow. Although a SFP from say dell should would in a HP card especially when they are manufactured by the same third party vendor but the manufactures put software restrictions to prevent you from using anything but their SFP.