The pictures are great 
You can cut a new hole but you must soften the end of the spring first by heating it to a cherry red and then letting it cool slowly, It will then be soft enough for you to punch a new hole in it. Just try and heat the end inch and a half or so of the the spring. It will just mean it might loose a little running time as you have a slightly shorter spring. Well done for getting this far, it sure looks to me like that clock was not designed to be serviced but thrown away once it broke. Just shows you what is possible with a little determination.
