A new paper concerning this study and these aDNAs was recently published: 0pubmed
The 5 aDNAs identified as belonging to R-U106 were confirmed by FTDNA, with more refined haplogroups.
For example, KOS015 (Koksijde 15), previously identified as R-FGC17465, is now identified as R-FGC17460, by FTDNA. Or an average TMRCA going from 1500 BCE to 200 BCE (if we consider KOS015 as positive for the 11 equivalent SNPs of this haplogroup).
BAM/FastQ files are available from the European Nucleotide Archive under project PRJEB70768.