I would suggest that you either:
a) send it to the manufacturer for the overhaul/recertification or
b) send it to an EASA approved organisation to do the same
Otherwise you would need an appropriately approved/type rated person, they would not be B1 or B2 as at a guess the a/c/engine is in a group less than 5700kgs and these are still covered by BCAR type ratings and not EASA.
I think a D licence would be at an overhaul facility anyway and they would have to be covered by JAA/EASA 145 organisational approval.
I think the quickest and or easiest it to get it to an overhaul facility or the manufacturer.