http://custompb.co.uk/ do annoing and lastering. I'm pretty sure there's a couple of guys on here that also do it.No idea would be nice to find out, as would liek to do the same with my etha. where would you get the anno done?
what he saidan Etek/Ego10 metal feed will fit, as will the oops knob from the Etek4 am. No idea if these are available you would have to ask Stoney or Nicky T.
We have never made eye covers, Frame or trigger for the Etha in metal. Not sure but i think there are a couple of places making aftermarket triggers for them but i have no idea who.
long story short eye covers and frame are going to be your sticking point.