I can add one more item to your old boss' list Mickey.
"If you want something done and you don't know how to do it, FIGURE IT OUT!" LOL! Letting stuff sit around with unresolved problems, hoping someone wiser will come along to fix them rarely works out well.
Surgi, removing stuck hilts from their blades is not rocket science. But your problem seems to be just the opposite, a hilt that is too loose, so that is not your issue. If you want to tighten it up a little follow my advice above. Just be aware that wood and metal expand and contract over time, so don't add too much material to the pesi (tang) or it might crack your hilt if things expand over time.
I find it amazing Mickey, that rather than learn how to remove those keris and tombak you own from their respective wrongko and tutup, you would rather just let them linger, stuck inside their cases. Are you not even interested in knowing what these blades look like? It is quite possible they are rusting away in there and sore in need of maintenance. You can send them to me if you don't really want them. LOL!