Merlin Rockers needed Replica MKVIII Spit

We have been beavering away on our MkVIII Spitfire replica since the Meteor engine was fitted. One of the most important jobs is replacing the rocker cover that holds the oil filter, it isnt smooth like the other side but has mountings for the oil filter and generator so it has to go. I had kept another smooth rocker which i saved from a Meteor that i broke for spare’s, went to fit it the other night and guess what it doesnt fit, the shape is fine but the bolt holes are out of line. Desparately need a set of merlin rocker covers or at least one I guess it would be the right hand one looking from the reduction gear end? to replace the meteor one. I know its a tall order but have some interesting swaps or cash waiting. I really need a pair as i also need the rev counter drive.:) I also need some exhaust gaskets.