Try getting a drive cleaner before you start spending. It might be a simple case of the thing needs a good clean. I piacked a drive cleaner up from Maplin for £2 and that resolved a lot of issues, until the drive went click clink crunch lol.
If it's spinning and making sounds it's promissing. However I am not sure how you would get Amiga Exploring on your 1000 if you can't get to any kind of DOS.
