I was able to receive a pdf copy by e-mailing firstname.lastname@example.org and requesting them.
I wrote to them and got the following reply:
Phalanx Games (Netherlands) has adopted the policy not to provide free rules for German games.
It is, however, possible to buy the rules from us for (in this case) a fee of 5 Euro.
If you would like to make use of this option, please let me know, and I will explain the proper way of ordering and payment to you.