Mats Lindroos has talked to Frank Zimmermann (the editor of the PRAB), for publication of SLHiPP-2019 contributions in PRAB, which is a highly respected journal of APS (http://journals.aps.org/prab/).
The proposal is that authors who wish to submit a contribution which has been presented at SLHiPP-2019 does so through regular submission to PRAB. Please write in the acknowledgment that this paper was presented at SLHiPP-2019. The acceptance will be communicated with normal PRAB procedures.
We encourage submittal of papers for PRAB and we look forward to seeing such papers published.