Harm Visser made a great “physical modeling toolkit” for Kyma X that I’ve used in the past, and that might be a good starting point….?
Some/many of the sounds still work in Kyma 7, but some of them don’t, and I’ve not had time (nor do I have deep enough knowledge in that area, to be honest) to troubleshoot them:
http://www.hvsynthdesign.com/kymax.php
I’ll be interested to see what you come up with!