To be totally honest i don’t believe that the boot discs are available to download at their website or any other location that is legal. However i do agree that ebay or another auction site may have the disc your looking for, which is probably your best bet.
The only other alternative i can think of is to try contacting Toshiba’s customer support…but not recommended, use only as a last resort, as we all know how aggravating customer support lines can be.
[I] Hope this helps![/I]