If you have an REI or somewhere that sells mountain climbing gear, they should have some one inch tubular webbing for around .40 cents a foot.
Some places that have tree climbing gear will have it as well. Some of the lawn mower/tractor stores cater to tree climbers.
They might have some at tractor supply, or anywhere that sells horse tack.
Some army surplus stores carry it.
Possibly west marine or similar.
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