Does anyone know of a place you can buy mild steel pieces that can be welding onto other things, that isn't necessarily box shaped, rectangular, a tube or rod, or a sheet, but say a handle, or a pulley holder, etc.
Yes, there are catalogues, now on-line, that supply wonderful things. Those spear heads on top of iron railings are standard catalogue items as a rule. Trouble is I can't remember the names of these suppliers. Someone will probably be able to give us some suppliers. What is a pulley holder?
F H Brundle do the spear head railing things.
Loads of other places for all sorts of other stuff but you might need to be a bit more specific on what you want / using it for..