Respectfully, I genuinely appreciate the time and knowledge that you have shared. However, there are only two reason to use a non oem or oem style replacement part is the lack of availably or an inherent design flaw.
Also respectively, I disagree, being that you are neither the OP with the problem, or me with the advice. If you had read the thread you would know that the OP has ordered both. I made the suggestion, originally, because an alternative was neither viable (new harness) or available at the time, until you found a link to a replacement part, and for that my hat goes off to you. My reason for fabricating the part was to get the OP out of trouble. That is a reason that you have failed to mention in your criticism. And if you hadn't have found that link, were you prepared to get the OP out of trouble?
Being that the OP has ordered both the diodes and the OEM (it's not - it will replace it though), I again suggested the use of the diodes as a smaller alternative, that with a few minutes soldering would a) move the component to outside the harness, and b) would be infinitely easier to access in the future, not to mention getting rid of the huge box to mount a tiny device. These are distinct advantages over the OEM single device. Of course, the OP is free to choose for himself now that he has both options. I don't know about you, but I'm very cautious about what advice I give and always try to weigh the pros and cons.
For $5.00, I am not fabricating electrical parts when I don't have to.
What an arrogant statement. Nobody asked you to.
But if you want to bring cost into it, I can get a pack of 10 diodes for less than £1 in UK money, which is, I believe, just over $1.00. Just saying. I'm currently in the process of repairing a 2012 S3 ignition switch. The member cannot just buy another switch ($181 + key programming), the barrel and key has to be kept since the key contains an RFID chip and the barrel contains the receiver, which disarms the immobilizer. So, if my fabrication works, then I'll save that guy well over $200.
So - why do I want to fabricate electrical parts even when I don't have to? Well, you are not me, and I'm not you. Cost isn't always the cause, especially with things like the diodes. Apart from seeing a challenge in it, it can also provide useful alternative methods to get the job done - a plan B often with improvements/advantages over plan A.