You might check out this guy for DF21 testing..
fN110523 Brunhoeber Germany
L144-, L159.2-, L193-, L21+, L226-, L96-, M222-, M37-, P314.2-, P66-
He just upgraded to 67 markers and below are his nearest GDs, in the 7 to 9 at 67 range, which isn't bad.
fN110523 Brunhoeber R1b-L21 zzL21unassigned
f98386 Springer zzL21suspect 21-2225-EC
f176253 Springer zzL21suspect 21-2225-EC
f172278 Pry R1b-L21 253-1716
f99379 Edwards R1b-L21 zzL21unassigned
f23567 Lowe R1b-L21 zzL21unassigned
f129821 Donahue zzL21suspect 13-1511A-T2-D
I don't think he is 13-1511A-T2 (Irish II) because he is missing a key marker or two. He could easily be DF21 or Z253 though.