GM HEI "M4 pin" to female socket distr cap??

Yes, I had Googled every combination of words I could think of. I did find some lone terminals like this, so if I had to I guess I could get a coil wire kit and buy one of these and make my own. I was just hoping to find a pre-made wire if I could. I think the LS1 coils had this M4/pin as the output type. I found these terminals from Summit which are much cheaper than the one on eBay ($32!). I think they'll work, but wondering what others have done in this situation.

Summit Racing® LS1 Coil Boots SUM-850446