actually rick babies from HT sent in his harness w/ this plug for me to built and yes he told me he got it threw some one on k20a.org.
I actually cross reference the part # on the plug and came up w/ a place to get them from brand new and they are way more affordable than anything out right now.

im building one on a k harness right now, im build a similar harness for elfather and im thinkin of building one for my car wit that kind of plug just to show that the plug works flawlessly from all the reviews ive read its a winner lol.