according to this there are 13 people who have the achievement, but i can only manage to track down 9 of them. i just followed the chain from veb (the original owner (?)) to the rest of the people who traded the same set around for years. can someone tell me the other four people with the achievement please

here are the 9 names i have so far:

veb
marcus
lapsus
magicalsack
gubbin1
sagemsk
sagemskitemdump
armagetron
dynastar

it's possible i just got lost in the transaction histories and missed a few trades but i doubt it. perhaps there is another set of 500 bloods around.