The journal of the Association for Reformational Philosophy Philosophia Reformata is to be published in the future by Brill.
The bad news is it looks like the www.philosophia-reformata.org, which contained an archive of older issues, is no longer available - I accessed it today to find an advert for a web hosting site.
The good news is that volumes 76-80 are available free (until the end of 2015) from the Brill site.
However, it requires registering and using an access code - details are on the Brill link above.
Much older issues of the journal (volumes 12- 57 (1947-1992)) are to be found here: