Wireless Joint

Does anyone besides GLI make a hotspot that you can use a radio module in? The GLI is a little lacking in wifi performance.

https://www.gl-inet.com/products/gl-mifi/

I guess a Pi or PiZeroW cobbled together would be a bulker option.

How would you best combine Pi and PiZeroW for this btw?

Not that I'm aware of, but a Raspberry PI is the best alternative and much more flexible for future needs as well. It's all I built for LTE modem setups these days.