Sorry about that, for some inexplicable reason I thought you would know, I should have asked.
The three files are Hidden, System files and as such have to be Unhidden.
L.click My Computer
L.click C: drive (this may be labeled as Local Disk C:, this is the system partition.)
L.click Tools
L.click Folder Options
L.Click View
In Hidden Files and Folders bullet "Show Hidden Files and Folders"
A couple of lines below that untick "Hide Protected Operating System Files"
Click Apply>OK
The files mentioned should now be visible and can be copied.
As to where you can copy the files from, Dusty wrote
Copy these three files to a floppy diskette from any pc running XP.
It doesn't matter whether its XP Home or XP Pro but it must be XP, Vista does not use those files. The type of computer, laptop/desktop is of no consequence. Getting the files from your laptop onto a floppy diskette might prove difficult, I assume your laptop does not have a floppy drive.
There is another solution which might work for you. Go to
this site and download "Boot CD - Windows XP Emergency Boot CD" (158k 11-March-2007). This is an ISO file and you must burn it to a cd (again assuming that you have the facility to do this). The file can be downloaded/burned using any pc but will only perform where Windows XP is installed. Ensure that on the problematical pc the bios is set to boot from the cdrom first, put the burned cd in the cdrom and boot the beast. The theory (works for me) is that the system will use the boot files from the cd but load the version of Windows XP installed on your hard disk.
If the above works for you, unhide the folders/files as above and search for NTLDR. I think you will find it is still on the hard drive but couldn't be found.
Edit: Must go now, will check back in about three hours.