GDPR query

Apologies for posting this here, but there are a few forums that I appear to be 'locked out' of, GDPR being one of them. 

We are a very small charity, and outsource a couple of backroom functions. I am nominally the Data Protection Officer, and I've been here since January 2019, so still fairly new. 

Can anyone recommend a way of finding an appropriate Data Protection specialist, to advise us on a couple of issues? The guy the organisation used previously, to advise on transition to GDPR, has very limited availability, so has not been able to help.