Does anyone know if a nuk 5 or whatever they are calling it these days is available in silicone? I think the latex is irritating my lip. I see pacifiers r us has the teats but I haven't gotten a reply to my email to him if they are available in a regular guard. I don't want a little guard because they are smaller than a regular medic pro guard. If there were bigger ones that would be ok. Does anyone have any info?