How to tighten a Kaskara hilt?

[blue lander]

I picked up Kaskara off e-bay recently. I assume it isn't particularly old and the blade has no markings on it. Other than being a little rusty it's still decent good condition and dangerously sharp. The blade wobbles a bit, though it doesn't feel at risk of sliding out of the hilt. Is there any recommended way to tighten it back up? It looks like hilt is stuffed with fabric/cloth on both sides of the blade to act as shunts.