Robert,
done a bit of digging in the forums and I found the poster's website
horsemansshop dot com dot au
You may want to try and get in touch with the owner of the site and ask them for these files (zipped):
includes/modules/payment/netregistry.php
includes/languages/english/modules/payment/netregistry.php
It would save a lot of time trying to port the osC module
Cheers / Frank
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