bastrah
Every size makes my wood rise
I also own the Cheapino and made myself a keymap which is fully working. You can have a look at it here. Hooe that helps at least some bit.
Regarding the qmk toolbox: You can take the json file from one of the keymaps in tompis qmk_firmware repository and upload it in qmk toolbox. Then you can have the correct layout and you can configure it to your liking.
It’s pretty straight forward though you need some soldering skills, especially for the little usb c connector. I used this site: Cable Guide in combination with YouTube videos of Cruzctrl.
In short: You need wire, paracord (for sleeving), optionally techflex (for the shine), some heat shrink, usb connectors and any connectors you’d like to put in between (in my case gx16 aviator). Then you sleeve the cable, put techflex on, solder the connectors, apply heat shrink and you’re done. Though that’s just a really short write up. It’s not overly complicated but also not as easy as it sounds.
Here is another picture
Cool design!
One of the best cheap (non-custom) options is the Alpine MusicSafe Pro (~25€).
If you wanna go for a custom hearing protection you’re quickly into 3 figures. Here in Germany there are some vendors for custom stuff where you could get some “no name” custom or some brand stuff like the Alpine PartyPlug Custom for ~200€.
But with all custom stuff the price heavily depends on what exactly you want, from which brand and where you are ordering it.
In general I would recommend getting the cheap non-custom option, see if it works for you and if not you can still cash out for some custom ones. 25€ is not that big of an investment compared to the price of a custom set.
One of the cheapest options might be building a cheapino. It should be around 50-70$ all in all. Though it’s completely DIY and not the best option for beginners.
You’d have to order the PCBs and all the other stuff yourself and build it.
If you don’t want to or cannot do that, there are already a lot of good options in the other comments.
EDIT: spelling