i think you might be able to do a free download onto your computer.... try a google search (but beware, a lot of these music download sites generate a LOAD of porny pop-ups.... .... best not to do it in front of the kids!)
well, you'll hardly want to risk the pop-ups or the loud flintstones music at work then! Perhaps you could sneak in early, do it and b urn it onto a cd? Or get a kind friend to do it for you?
otherwise, google or amazon search for a tv theme tunes cd..... if i come across one, i'll try and post it here!