Many thanks, GatoGordo. Yes, I think that is probably the only way into it. I had already thought that (with a straight needle) needle nosed pliers would be the tool to use but, hadn't thought about shortening the needles - so obvious when you think about it. The only other issue is drilling accurately through the lining and I think I have that one worked out. As you indicate a long and tedious job ahead but, will be very satisfying when it is done.
Thanks again for the so obvious solution. Nothing like 20/20 hindsight!