Clementi Nicholson Improved

There has been a Clementi Nicholson improved up on Ebay for awhile. It has a lip plate. I am wondering if anyone with an allergy to cocus has ever found that such a plate really helps or whether some other form of protection from direct contact works better. The link to that flute ishttp://www.ebay.com/itm/Clementi-Co-Nicholson-Improved-8-key-wood-Irish-flute-/181213628215?pt=LH_DefaultDomain_0&hash=item2a312c8737