Autism and OCD

Hi, my 12 year old autistic son is severely struggling with OCD and has also started self harming (pinching himself).  He has been talking about things being contaminated for a while but it has escalated over the summer.  He is constantly washing his hand, lick cleaning himself and will not touch a lot of things or people.  We have only just realised it is a form of OCD.

the school have been great and are going a Cahms referral but that could take forever.  I’m looking for private help for him but don’t even know where to start looking.  He needs help, looking at NICE guidelines a combination of CBT, ERD and anti depressants seems to work best in high intensive therapy.  But where do I go for all of this.has anyone experienced something simil