>Is this what you were using before to plug your Tesla into J1772?:
J1772 adapter

Yes. I still have it, will be putting it on ebay soon.

>Did you even know about Tesla's "solution" before you found hpsharp's?:
J1772 Mobile Connector Tesla Motors

Yes I did, but I thought Tesla's solution was overpriced and also didn't offer a lockable feature which I didn't want to come back finding my cable gone, my car unplugged, and worse no way of getting a charge back into the roadster.