Amazon carries several sizes of asphalt wire loom that may be the same material currently on your car.
Here is one size that might be good for the fuel line and they have larger too.
YnZ is another vendor although they may have a minimum order amount and there are some ebay vendors that also carry it.
A product with a finer texture that still looks very similar is
braided split loom which would be much easier to put on but I don't know if the composition of that material could stand the heat next to the manifold.
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