Im fairly certain Luffman Eng can do what you want.
Over the years theyve done a fair bit for me, always good, always on time and price reasonable.
Cant speak fairer than that.
01884 821076
Luffmans do quite a bit of stuff for me, bashplates, disc guards etc. Mostly laser cutting and fabrication. Not sure they do CNC but wouldn't be at all surprised! Ring Gary - really nice bloke!
Is it the Norton that you need engine plates for? You're welcome to see the ES2 in normal opening hours. It's kept at work. Find us on www.colytongarage.co.uk
The existing gearbox plates are a bit home made and agricultural, it's got a later AMC gearbox, so needs the plates from a later model, and I have the plans from another club member who also wants a set. Trouble is I work normal working hours!