Copyright and licensing laws aside virtually any Dell "reinstall" disc will work on a broad range of Dell computers.
In the US the "license" for your OS software was paid for as part of the purchase price of the computer
I must comment though, by way of disclaimer that microsloth might argue this in court, and probably has done so (likely several times) they have yet to get a Judge and/or jury to agree with them.... in this country.
If you live outside the US different rules apply...
As for Dell drivers? they are essentially all available on the Dell Support & Driver download web pages.
(Easily found with a google search for your computer's model number)
IF the computer in question is still in it's original tag you can greatly narrow down your search for
those drivers by using the service tag number on the case... Yes, dell knows what hardware they
built it with originally....
I do restoration work on computers and greatly prefer dealing with Dells and HP/compaq computers.
Particularly if they are in or near their original configuiration.
HP/Compaq's will actually autodetect what they are built with and pretty much choose the correct
drivers for you. though installing them in the correct order requires some care...
Most "issues" on a dell IF you can get it to boot and connect to dell via the network
are resolved by updating the bios.
Frankly the only drivers I usually bother to "sneaker net" to a dell I'm resurecting are the network drivers
(usually on a thumb drive), because the sooner I can establish a network connection
and temporarily set the browser homepage (atleast temporarily to Dell's support page for that
computer's service tag number the faster the whole process goes.
Now, I've gotta go poke the HP DC7600 I'm currently working on with a sharp stick...