Chewing stims

Wondering if anyone can suggest any chew jewelry that have a similar texture ect to baby pacifiers. I've tried several chewies and either the texture is off or it feels to hard. 

Despite it working I can't bring myself to carry a child's pacifier round with me, so I'm looking for something a little bit more age appropriate I guess as without something designated for that purpose I find myself biting my hands or clothing. 

Any ideas?