OK here is what I did with a $4.00 king quilt I found at GW.
It had a hole the size of a silver doller all the way through like
yours. I started with a piece of batting bigger then the hole to
fill it up. The added fiber glue around the edge and just tacked
it on both sides. Then I found a patch close to the color for
the top square and patched it in the seams as best as I could.
On the back tear I put a heart shape top patch applique stitch,
and then made it a label with the info as to date, and discovery
data. Not perfect but came out better then I expected, and I
have to even hunt for the repair on the front.