I have heard a lot of nasty stories about their so called "Ex RNLI" engines both here and on YBW forums.
I owned a 70hp Evinrude on my cuddy cabin boat and it is a PAIN in the Back side. Never EVER again try those two stroke evinrudes...NEVER.
The ribs are imported, I searched Alibaba websites and there are plenty of manufacturers especially in China who build these ribs. There is even one for sale on Ebay.
Have a look at this: