Note that your laptop should reasonably be able to run Morrowind, so long as it has...
At least Windows 98/ME with 128 MB of RAM
OR
Windows 2000/XP with 256 MB of RAM
1 gig of free space on your harddrive
500 MHz Intel Pentium III/AMD Athelon processor (or better)
32 MB Direct 3D Compatable video card w/ 32-bit color support
... Looking at that list, I think most PCs and laptops come out of the box with better equipment...
Anyway, you might be able to find copies on Amazon, Best Buy, or Gamestop. But your best bet is with Steam. For 20 bucks, it's yours.