Ok guys,
I had the local metal yard
cut the side plates for me and in a different yard I got the sheet (6
mm-- <1/4)that I will use for the blade. I will add to the blade a cutting edge, I have not decided yet whether that cutting edge will be welded on or bolted. I am leaning toward welding--It may not even be changed in my lifetime.

I also picked up the main square profile that I will use for the draw beam (but they
cut it 1200
mm when I asked for 1250
mm 2 inch difference).
Well I asked for 10mm (3/8) on the side plates and got 15mm (9/16)

They would
cut me new ones, but I decided that I would take the ones they
cut for the price of the 10mm and just count it as extra weight--not sure it needs extra weight though!

Additionally, what I did not know until I got home was that both plates were not exactly the same size. I ended up cutting 3/8 in off one plate so that they were close to the same size. I spent some time grinding the plates to smooth them up.
I did cheat a bit and stopped at a shop on the way home which has this huge old brake and bent the 6
mm sheet in 2 places at about 20 deg for the blade.
I welded the sides to the blade and saw
cut the pivot holes in the sides. So it is now taking shape.
Mike in Warsaw