Do you mean this one Evan, with the Metrovick F.2 engine
Yes, that one. I was under the impression, mistaken or not, that the Metrovick F.2 was the Beryl.
I wasn't sure that the first engine engine had a name Evan, but reading about it the engine that's in the underslung nacelle was designated the F.2/1. It had a nine stage compressor.
The Metrovick F.2/4 was called the Beryl and it had a ten stage compressor. It was almost twice as powerful as the F.2/1.
According to the Aerofax book, the nacelle that you see in the through-wing design was used to test the Sapphire too, and then the Avon although there's some slight differences to them. The wing though is not set quite dead center on the round nacelle of these prototypes, it looks like the bottom edge of the chord is on the centerline with the top edge being up towards the top of the nacelle giving it a slight underslung appearance.
But to answer your question, I don't think there's any conversion on the aftermarket. At least I haven't seen any.
Building the one I'm doing I found the shape look a little like the BAC 1-11 engine nacelle and that is what I've used as a base. I did though, use the very rear end of a Supermarine Attacker fuselage for the exhaust area of the nacelle.
Another thing that I discovered was that this F.2/1 prototype used the same extended u/c legs that the Trent turbo-prop prototype used. The u/c raised the aircraft up about half a main wheel rim diameter.
