Known working Mini PCI-E extension board?

Anyone know any Mini PCI-E extension boards which can connect all lines/pins one by one? Because BE14/19 12V supply will use the unused pins on the connector, nearly all of the existing adapters omit that connection from their extension implementation.

I am currently using “this” https://www.aliexpress.com/item/1005003023021149.html (looks like exactly like this), but all the unused and the SIM pins are omitted from the extension side, that means neither of the BE14 or any GSM device will work. However, this adapter is working fine with a pair of 6E AsiaRF cards.

Yep, I found the (seems to be abandoned) Sinvoip’s own project at here: BPI-R4 Accessories : WIFI7 module extension suites

BPI’s adapter board is probably a custom design; it likely involves routing out the 12V power supply separately. In reality, it uses the same interface as the original.

Yes, the pins used for 12 V are normally not used by the PCI-e specification, that’s why it is omitted from lots of extension boards. That’s the point of my question; I am looking for one where all pins are connected and suitable for modern usage.

I have an old one from around 2009-2010 (looks like this: https://www.aliexpress.com/item/1005007331701130.html), which is usable for 12 V and the onboard SIM slot on the R4 also works as well. My older Broadcom 4311 and Atheros AR242x cards also work (those cards are around two decades old), but my newer cards (like the AsiaRF AW7916-NPD) are not working with it (maybe it’s a signal integrity issue because of the newer PCI-e version).