Custom Docks/Dongles

[Reetik2000]

Is there any service out there that makes custom docks and/or dongles like choose what ports you get on your dock/dongle and order it like a Subway sandwich or choose the customization when you order a PC but it's a laptop dock/dongle or maybe even some schematics so I could at least build my own(yes I do have some small  electrical engineering experience). I looked everywhere. The ones I found were like super expensive and had a bunch of extra stuff like SD card readers.

 

I'm trying to get a USB-C dock with these ports:

• 1-2 HDMI
• 1-2 USB 3.0 or above
• 1-2 Type-C(at least one with charging pass-through)
• Ethernet

The cheaper the better.