Hey Lunar
I don't have a recipe however I have added concentrates to my canna ointment.
The method I used was to first dissolve the concentrate in a smaller amount of the carrier before mixing it into the larger amount. This way I could break it up and dissolve it more evenly.
I use coconut oil but others use shea or others.
I add a bit of oregano, lavender, and mint to cover the smell, help preserve the ointment, and add medicinal properties. You could simply use quality aromatherapy oils or of course extract your own!
Hope this helps.