The Olympus is used by many onshore and offshore facilities as gas turbine generators, etc. Maybe someone like the Rolls Wood Group, who overhaul many of the onshore and offshore Olympus, could be approached. The basic engine would be the same and I know they employ many ex RAF 'sooties'.
They look after 166 Olympus turbines for 48 customers, so probably have a fair idea of what is involved, mechanically if not bureaucratically.
Rolls Wood Group Ltd