For the sides get some thick flat bar and attack it with an angle grinder and powerfile. Unless you’re planning on making a rivet perfect replica you can get near enough with care, attention and a profile template especially for the shortish lengths that are needed.
Either that or slice some 7/8 round bar from College Engineering. Boring but possible.
Robert has recommended one of my regular sources for the round tube. A good and reliable supplier.
Either that or slice some 7/8 round bar from College Engineering. Boring but possible.
Robert has recommended one of my regular sources for the round tube. A good and reliable supplier.