anyone know what i can use and where i could get some aloy section sutable to make my own screen frame for a flat glass screen?

idealy i want somthing that is bendable and has a radius on its edge like a u shape if i can.

You can buy the frames from GBS
But if you want to do it the Haynes way finding grooved bottom section and radiused top is difficult
As it Ally filling your own radius is easy, metal file the edges then wet & dry the whole frame to a polished finish

Perhaps you can make your own section using a solid square section of the appropriate size.

Aluminium is perfectly workable using woodworking tools. At the very least, a router and a couple of tungsten carbide tipped tools, are required. A jig or two, to guide the router, or better still, a table mounted router, would make life easier. It does not need to be a fancy table, just a flat surface to which the router can be fitted from underneath and a fence can be fitted on top. A circular saw, or preferably a saw table if available, can also be used to remove the bulk of the material, to create the U channel. Take a number of passes and make small cuts at each pass. A round-over bit can be used to create the radius around the edges.

Purchase the material beforehand, so you can plan accordingly. Screen to scuttle trim can be obtained here as can other sections of trim to go around the glass.

In either case, make adequate use of push sticks to keep hands away from cutting blades. Keep safe.

I couldnt find anywhere to buy the extrusions so ended up ordering one from GBS which fits the Indy nicely.