Why is this USB OTG Y cable so hard to find ?

[ThermallyFrigid]

I have a SEEK Thermal Compact PRO which has a MALE USB Micro plug sticking out of it.
I also have an External USB power pack that has a FEMALE USB A port

What I would like to do is power the SEEK Thermal Compact PRO from the EXTERNAL USB Power supply and NOT from the Android phone.
I hear repeatedly that to do that you use a OTG USB Y cable.  But what I'm looking for (which seems would be common) doesn't seem to exist???
Even at the SEEK Thermal Support Website they show a picture of a Y cable with a Male + Female USB Micro and a FEMALE USB A port ??

Ok, I "could" use that Y cable but I would have to use a MALE to MALE USB A cable to adapt it.   That just adds more cabling and more impedence.

Here's one on Amazon.....
https://www.amazon.com/Toch-Micro-Cable-Galaxy-Samsung/dp/B00OZ4N9PK/?pldnSite=1

See the FEMALE USB A port?  I need a USB A MALE instead.

I have a hard time believing noone in China has figured this out and made one?   OR...am I totally missing something here?

[Mechatrommer]

i'm also still waiting for my seek compact. since usb port of my SP is backward i'm going to just make a thermal selfie of myself with it, so i searched locally so my camera can be pointed to anywhere, same no cable, but a good ingredient does exist...
https://www.ebay.com.my/itm/Original-fast-charger-usb-cable-for-Samsung-galaxy-S7-S6-edge-NOTE-5-4-Android/122572788583?hash=item1c89e85367:m:mxN6nxS2ifnfZWJXbFIzRCw
https://www.ebay.com.my/itm/50Pcs-Micro-USB-Type-B-Female-5Pin-SMT-Socket-Jack-Connector-Port-PCB-Board-LW/182409855021?hash=item2a7879802d:g:ewgAAOSwZQRYbIs4
and some diy pcb and potting agent to make it more robust... i have few stock of them so no worry...