Dear @Geekay,
Welcome back to the Wefugees Community and thank you for reaching out to us again.
I think it makes sense to contact a local refugee/migration counselling office for respective recommendations as they are most experienced with lawyers in your area. Furthermore, there is kind of an association of lawyers specialised in this legal field who work with NGOs and the UN - it's called "Rechtsberaterkonferenz". You may follow the link for the list of their members.
I hope this helps and please don't hesitate to get back to us with any further questions.
All the best,
Meike