I think if you try hard enough you can find that size.
That said, it's far easier to make a hole bigger than it is to make one smaller. If you can't find the exact size, try to find ones larger than the hole and just chisel the hole to fit the new pulls.
How to fill the cutout? - Get some matching wood, cut it to the size you need, cut the ends to 45 degrees (miter) and glue them in. Pretty much a picture frame around the pulls.