Where to find Maestro arches

Anything else with a similar profile that you can adapt? I can't picture the shape of a Maestro arch - in my head I'm thinking they might be similar to my Audi coupe in profile, but there's a massive difference between "a bit like" and "could be used". Failing that if it's not a complex shape, perhaps make the repair in pieces and weld together?

I'd considered Mk2 Golf arches and I reckon they'd do most of the profile, they just won't do the dogleg bit where they join the sill and that's the bit I'll likely need the most. I'll stick a picture in to illustrate. The car isn't here yet so I can't take different photos of it, but this is pretty illustrative of the issue. There's also an amount of filler in this arch, the profile should be crisper.



Here's a shot of the front wing to show the bit you can theoretically use on the rear arch, the opposite side.



A shot of a much better condition version of what mine is, so you can see the size of the arches. They're a good bit larger than the ones on a Golf, from memory.