Oh, those poor plants! I wish I had a definite answer, but I've never heard of this before. I quickly googled cork, and it is biodegradable! If it were me, I would plant the whole thing into a pot with some good soil. They make succulent potting soil that is sandier for good drainage. Try to gently pull the roots down into their natural position and bury the cork, glue, roots and all. Try to maintain the original soil level where it would be if the cork were not there. Once the plant is in the hole and the roots are buried, tap the plant on a table to make sure the soil comes into contact with the roots, and water it in really well. Make sure it has good drainage, succulents like to dry out in between waterings. Do not use a pot with no drainage holes! The cork will disappear, but the glue will not. I don't think much can be done about that, though.
This is just an idea, I have never tried anything like this before. If I owned these plants, that is what I would try. Good luck!