KuroKitsu
Headphoneus Supremus
Sure the trimmed impressions has proprietary information that they don't want to give out. But they also have the raw untrimmed impressions that they refused to give out for whatever reason.Unfortunately, 64 doesn't share digital files as they consider them somewhat proprietary
Not to mention their trimming policies change a lot. From the same set of impressions, I've had 4 customs made each with some differences.