I ordered one of these DIY PK3 from dasetn a few weeks ago, arrived today. It looks like the PK2 that dasetn is offering though, same Brainwavz/Visang-style cable. It came in a Denon storage case with a couple pairs of earbud foams.
First impressions of the sound so far are not very favorable, they sound very veiled and closed in. I don't have any legit Yuin earbuds to compare, but I actually think my old Philips SHS3200 sound more resolving.
I should be receiving an AP8 from dasetn in a few days too, I believe someone posted impressions about them in ClieOS' earbud round-up thread, and they seemed positive about it, so hopefully it's an improvement from the DIY PK2/3