If you have v4, you can downgrade on https://new.handyfeeling.com/
Go to “Configure Device” → then “Check for beta versions or downgrade”
There you will find the v3, that should work with intiface.
Also Intiface verstion 2.6.8 is recommended.
There is nothing in edi’s gallery.
[Integration Script] Pure Onyx (2 version script) - Scripts / Free Scripts - EroScripts
You can check this post, someone already making those you just need to be patient