I own one of these ribs (4yrs+) I had it surveyed by a very well known RIB journalist. (friend) He knows Peter Kidd (Malaysia is his last known location, and yes he does that kind of work out there).
Vector Mirage bloody strong RIB, made well, goes like stink. Good sea boat. I took mine from Portsmouth to Torquay and back this year (one of many journeys) - no problems for the boat, occupants where a little rough (it was a stag weekend).
Mine has 200L integrated fuel tank, Water Ballast (noes tank), Came originally with Mariner 200HP V6, now fitted Evinrude 225 HO (probably a bit over the top). Before going bust Vector had strong off shore sales in the Canary Islands, the boats were renowned for speed, sea handling and build quality - hence their rather dodgy use out there on runs to Africa and back.
I believe Ribeye 7.85 uses the same hull mould, Osprey and another company also use it or have rights to it, I don't believe they have built many, I did speak to them earlier in the year (Milton Keynes based from memory) Certainly the similarity is uncanny underneath.
Definitely a proven design, Hope that helps.