For those 'Down Under' looking for Vogtland springs, this is the reply I received from Vogtland in Germany (translated from German using Google)

Hello to Australia,
unfortunately we do not have a partner in Australia. In new Zealand however it is the company Suspension progress in Pakuranga, Auckland Tel. 0064 21378902 ability you us a partner in Australia recommends, we looks for a representative, who sells and drives our feathers/springs out. Thank you for your assistance. Yours sincerely,
Best regards Christian Klose sales manager

So it maybe worth getting a quote from N.Z.?