Hey all,
I need the above mentioned integration done for a personal project.
There was a first step done on Google Maps by @Renan_M_falo here, but it would need the marker clustering functionality added.
And @forresto did something similar with OpenStreet Map here but it would also need the Leaflet cluster functionality added
If this is in your remit, send me a PM.
This would be a paid job.
Cheers