Manatic
This may be a long shot..
However the Mob called Stronghold Miniatures in the UK, did a very nice Spanish Colonial Fort in 25/28mm.
The bad news is that the guy who ran it , could not run a bath ..
They faded away.
However I believe that bloke still floats around the scene ??
He may go by the moniker Tardis ...
Yes all very mysterious ...

It is a shame as they had lots of stuff.
May be a poke around may unearth him , or better still someone who knows where the moulds / stock is .
Like I said his fort was awesome , don't know if any one does anything like it ( they don't )
Failing that Speak To TM Terrain , they could make you one ...there stuff is superb...
Cheers
Cheers