Emerson Girl,
What is it specifically that is too big ?
The HOLE, the BLADE.
My guess is the hole. If so, get a helpful, intelligent person
to "mike" the hole and get a GROMMET to go in the hole w/ a smaller hole in it. This smaller hole needs to be comfortable enough for you finger and suffiently tight enough to allow a good seat against the
hole. I would start my quest at a Hardware store or Plumbing Supply Store.
Plan B, dip your La Griffe in Rubber Type of coating used commonly to insulate tools. It can be applied thicker in coats if necessary. That would fill in the extra size on the hole to compensate your finger size. It typically comes in a can and there are a number of brands availible in the States. It cures in a day or two and can come in some colors (i.e. red, black etc.)
Plan C, wrap around the hole except the blade portion w/ Paracord or other something more suitible for your desires. Seal it by melting it w/ flame from match tip.
BTW, ALL PUNS intended. :-{)
Hope that helps......