Questions on NOS Master Brake cyl

["Steve Rubano" <srubano@xxxx>]

I have a few questions about the NOS Master Brake Cylinders. Is it 
advisable to buy them? I mean they have been sitting around for about 
20 years, wouldn't the seals have dried out? The bore be pitted by 
mositure? I don't know how they were pakaged, if they had any type of 
protective lubricant applied to them, etc. Would it be better to buy 
the aftermarket type from one of the Delorean Dealers? I heard that 
the Newer type ones do not come with the switch, how true is this? 
Also does anyone know the make and the part number of the aftermarket 
type Master Brake cyinders that will work in the Delorean without 
having to change the calipers to match it?

Thanks in advance.
Steve