Garpoon bowfishing replacement rubber

[ozy clint]

Does anyone have any tips for replacing the rubber inside the garpoon points? It acts as the spring to deploy the barbs
I think they are latex and for the life of me I can't find any 5mm diameter latex solid cord to try.

Anyone happen to use something else?

[frank bullitt]

Have you check in the slingshot or spearfishing sites.
Mechanical Maintenance handlers may also have something, also.
Good luck, and good shootin too ya!