Assuming that Taylor is in the USA...
Another source is Axle, Inc of Elkhart Indiana.
They build Hayes leaf spring or Alko torsion bar suspension axles to
your spec. Electric or hydraulic brake option.
Bear in mind that neither electric nor hydraulic have a simple parking
brake, like the European mechanical brake systems.
http://www.axleinc.com/id2.html
If the mounting dimensions are the same as the newer Cobra trailer
axles, those are in stock at Williams Soaring, with mechanical brakes.
Newer being the ones with a single-piece floor, slightly wider than
the multi-piece ribbed floor models.
http://www.williamssoaring.com/catalog/cobra.html
Jim