Can hardly believe that. Smells like one more kilo/pound of b-sh-t thrown upon the media fan.
First, the Saudis cannot produce the toy themselves. This would become clear quite soon (like with the Iran case). The only way to get it is to buy from a friendly islamic regime (we know one, which BTW did not sign the Treaty on the non-proliferation).
Second, the world intelligences would uncover any talks, if any, between the buyer and seller at their early stages and raise a serious point (both confidentially and publicly).
Third, even the subject is delivered, whatever are the delivery means (surface-to-suface or air-to-surface), they remain vulnarable for hi-tech military powers (including Israel in the first place) and could be destroyed by conventional hi-pres weapons.