Thanks. I did in fact make a drive backup using Acronis True Image but unfortunately when I recovered the backup to my new hard drive it said "bootmgr is missing" and failed to boot up. I have established that many people with the same issue resolved it with a Windows repair run several times from the disc. That's why I need the disc.
It the image is complete then this problem should be fixable with an ordinary Windows 7 Repair CD that you can burn within a few minutes on any Windows 7 PC, provided that the CPU bus widths agree.