hi flyerross
looks like your restoring a rare mower
I hope someone here on the forum has the parts your after
if you have no luck you might have to make the parts your self or may be a friend that has a welder
might be able to help you
some times you have no choice but to make the parts if they cant be found
part 592 looks to be not to hard to make maybe 1mm to 2mm thick sheet metal cut and folded
part 585 is harder to make but still doable
it would have been made by a large press making it in one go from one piece off metal
it would need to be made in two separate parts maybe 1mm thick sheet metal bent to form the
sides and another piece cut to shape to form the top .then mig or tig welded together
after welding grind welds away and finish polish with a flap disc and then make small tags for the
mounting bolt brackets and weld them on
the morrision letters could be made with stickers of the right size
it would be easier if you had parts to copy for sizes .
just a thought anyhow if you cant find parts good luck
