can anyone help

Hi all i am trying to find a lister R type that once belonged to my
uncle. It was featured in the january 1990 SE mag photographed at the
great dorset steam fair. It was sold by him sometime in the 1990s to
fund other projects. I am led to beleve it was bought by someone called
Eamon Bull from the oxford area. Does anyone on here know Eamon or have
his address or telephone number, as I would very much like to find this
lister, as my uncle is no longer with us and this was the engine that
gave me the stationary engine bug. Thanks
Gary