This is DIY but the site does have an assembly service for their other boards, it might be worth contacting them about it.
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I'm thinking ur options might be a smaller one with a numpad layer or an external numpad. Otherwise I think you're going to struggle with finding this one m8ty.
The position of the number pad doesn't matter, as long as it has one. The number pad layer is what the Typematrix has, that's fine.
most ortholinear keyboards I've seen have a numpad layer and are customisable by via or something, so if you're happy using a layer that definitely opens your options up.
ZSA used to make the Planck, but it looks like it's been discontinued. That, and it's smaller than what you're looking for. But you could maybe look for a second hand one if you're interested?
That would definitely be much smaller than I'm looking for, but thanks, ZSA's other keyboards are now under consideration.
I have a Moonlander and absolutely love it! I also need a numpad, so I've got a layer mapped so that when I hold the bottom key on the left thumb cluster, the right side turns into a full numpad. It takes a bit of getting used to, but I can touch type the entire numpad at this point.
Moonlander FTW! I've been using ergo keyboards forever. Typematrix, Ergodox, TECK, you name it. The Moonlander is my goldilocks endgame board. Not too small, everything where it should be.
Is there a lock button where I can lock it in to "numpad mode"? It does look good, if maybe a bit pricey, and I could of course just get a separate numpad if it doesn't work out for me...
Yes, you can lock it with a key press. It's up to you how you want to go to the numpad layer and how you want to get back.
I have a Moonlander and based my layers on this tour. You can see the layers at the top. This kind of thing isn't limited to ZSA keyboards. Almost any QMK keyboard can do this kind of layers.
My first thought was OLKBs Planck or Preonic. There is also a copy cat on AliExpress. I have a Planck and I get super lost in the sauce without having a super different F and J key. The height also kills me without a big wrist rest. I've since moved over to a diy board using Choc or the even lower X switches My Board.
It doesn't meet your 'no assembly's criteria, but I think the BFO from keeb.io ticks most of the other checkboxes.
I know this violates a lot of the requirements, but it's what I use and getting stuff in Ireland was a pain in the ass, so if none of the other solutions work as a last resort you can check https://mechboards.co.uk/products/helidox-corne-kit it's a very small keyboard and requires full assembly, however it is ortholinear and fully configurable, once you get used to the concept of layers it offers a lot of possibilities, e.g. with the press of a button I have a numpad, but it takes a while to get used to and to edit the layout to fit what you prefer.