Somewhere on youtube there's a video of a guy who made a version of the modern Aigner style fence with interleaved fingers.
He did it all in wood.
Might be an alternative if you can't find a decent used original...
I know an old dealer in Bolton who will probably have what you want but he will most definately not sell. Every time I go I jokingly ask will you sell an item Ive been after for years. Weirdly if you bought a machine from him he will probably give you the item you want.