Even with the loss of these engines, the marine Olympus is still in service around the world and up until very recently in the Navy. There's even a company in Aberdeen who advertise Olympus rebuilds. The marine version is very similar to the 202 so I don't see why it's such a skills shortage. After all the 6 or 7 they have left all have very few hours on them. Just feel we are not being told the whole story on the engines.
The information is freely available from VTTS if you choose look at it.
1) The only engines approved for use in 558 are the original version of the Olympus. Unless you can find some in the back of a hangar correctly stored and with paperwork to prove it there are no more.
2) The CAA insisted on a very short engine life compared with original service use. This is about to expire.
3) The only body approved by the CAA to rebuild the engines is RR, and they aren't prepared to do so.