Depending on how good the clone is ...
The
threading should be M20x1 so that's what you want to look for. Chi Yous and Kings use M21x1 so they wont fit.
Click here for a pretty good list of mods separated by threading size. Though I believe Paragons battery venting is mainly through the top-cap (though I may be wrong) so that's what I would stick with unless you want to go drilling holes into the side of the tube.
In any case your best bet is probably just getting a different style
mod altogether with a top-cap and button assembly (I absolutely hate the Paragon's locking band) more to your liking. The Paragon is nice but there are better mods out there, though I'll admit few look as sexy.