i doubt jl does a re-cone, if they do, its probably more expensive that buying a new one. and i doubt anyone else will fix it since jl has patents on their subs. so, id say 10$ is not worth it for an un-fixable sub, unless you reallllly want it.
Honestly what's $10? I say take the chance and if no one will do a recone and/or it's more expensive than buying a new one then big whoop, you're out $10.