Current status is:
I received permission from Wilba to use his frontpanel design.
I'm in contact with Roelli figuring out the right approach to this bulk.
Haven't contacted Heidenreich yet, in a week I know more.
The measurements of the shipping box are 590 x 290 x 140 mm, so either shipping with:
DHL Päckchen bis 2 kg International mit Service Nachweis 17.90€ (only tracking, no insurance, 35€ damage refund) CN22 custom form
or DHL Paket bis 5 kg International 16.99€ - 42.9