[SOLVED] Help me find: Specific NES-to-FC cartridge adapter

[M-Tee]

I seem to recall a specific cartridge adapter being sold a while back, and I can't find any trace of it online.

What I recall:

• It was wide and sat upon the FC more like a base than just an adapter...
• ...so it looked particularly sturdy
• Was available in multiple colors (red, black, white)
• Was being sold out of Europe (maybe Holland?)
• Sometime between maybe 2018-2021?
• Might have been around 40-ish USD
• Seemed to be very well regarded
• I thought the seller was selling them through here, or through an online storefront linked to here (but I can't find anything in searches)

Is my memory playing tricks on me? Did I fabricate this product in a dream? 

[Jedi Master Baiter]

Are you talking about these adapters that let you plug in Famicom and NES games at once?

https://www.famicomworld.com/forum/index.php?topic=14896.msg187325#msg187325

[M-Tee]

Yes, thank you!

[Jedi Master Baiter]

Now I'm wondering, what does it read when both slots are used at the same time? Is there a toggle switch?

[P]

Doesn't look like it. You should probably not turn on the power with both slots occupied at the same time or they might have to compete, which I assume isn't very good for the hardware.

But wow I have totally missed these. Did anyone buy them? Were they as good as they seem?

[schnuth]

I wanted to get one but the postage to the US was almost just as much as an adapter. Someone was going to organize a group buy to save on postage, but sadly it never happened.

[P]

I see, I've sent Prince Tomato a PM asking some questions regarding the design of the Twin-Pin converter. They seem rather promising, hopefully outperforming other 72->60-pin adapters.