You might look into Indian-style tongs, sometimes called pakkad or sharashi
This kind of pincer-style tong is primarily used for grabbing and lifting pots off the fire (for the kind of pots that have no attached handle). There's a gap or space, which can hold the lip of your pot (or in this case, ramekin), while the gripping power is where the metal flattens and braces against itself - so you hold it like a vertical handle over one side of the pot, grab the edge (it won't slip because the side of the pot is gripped securely between the metal pincers, with the strength of your fist), and lift the ramekin up and out.
You might also look into pot grippers or pan grippers, there seem to be a variety of tools (with different designs, handles, and so on) under that name for securely bracing, holding, or lifting hot pans even when they have no suitable handle. You should be able to find one suited to gripping the edge of your ramekin firmly enough to lift it out of the water-bath.
Depending on how full the ramekins are, and how you need to set the grip, you should be aware that they may puncture a small hole in one edge of your creme caramel or whatever, since the gripping surface runs down into the pot - so if you're going for photo-presentability, that may be an issue, if you're going for how to safely lift the ramekins out, that may be an acceptable trade-off.