Hi,
here is the map R-U152>L2>Z49>S8183>S22778>S20782 I'm building based on the 23andme V5 result's I'm collecting:
bit.ly/YDNA-R-S20782
S20782 SNP could date back up to 700 BC.
In case you tested with 23andme, please check if you have any R-S20782 among your matches and in case send me a PM...