I bought an 'Early' Bay one a few months back and only found out when fitting it that it is actually a late-splitty one, upon querying this i was told that "early ones are no longer made but that split ones are the same". They're not the same, they fit and work but are not as deep as an early-bay one so when the fuel gauge gets to empty you may still have 15-20 litres left, which can be annoying because you can get used to pooling around on empty assuming you still have plenty in the tank.
I would hold out for a good original one if i were you.
Simon.