I cannot tell you. I would look for store that sells these 19" jack panels and also the keystone modules and put the questions there. Make clear what you want and ask them if their products work for you.
better spend few $ more for working stuff i think. But perhaps other people can give you good links with great prices.
i work mainly on routing in very large networks and have field engineers built the cabling for me. So my knowledge is more from the books and experience when i still did lan management, but we had ST connectors back than, and more hubs than switches..
The blank Keystone patch panel only costs $9 and the coupling is $2. I can experiment a little.