they may not exist.

I wish I could find a wireless numpad with cursor arrorws on them.
You can get ones with the cursor arrows as secondary buttons, but I'd like
a numpad with cursor arrows beside.

There are plenty of wired numpads with the inverted T arrows to one side, but I couldn't find a bluetooth version

[1] You could use a wired one, but convert it to bluetooth with an adaptor that's powered by 2 x AAA batteries - I've no idea how reliable this product is & it's cumbersome to have on your lap unless you build a baseboard to mount the numpad & adaptor together as one:
https://www.youtube.com/watch?v=6RvO04NA-A8
You'd be wise to go for rechargeable AAAs & a recharger kit of course...

[2] If the plan is to use the number keys to enter bet amounts or control hot keys, then you can change your approach & maybe use an x-box controller + software to do all/most of this

[3] Go to a custom keyboard company if you have the $s for that approach

[4] Look at devices for the disabled. There are some lovely single-hand user keyboards out there which are very compact. Not cheap, but very efficient once you learn to use one [a few weeks to master]

Here's a tacky ready-to-go solution, assuming your requirement is for poker. Watch video: http://www.pokercontrols.com/product.../images-videos

Includes five preset bet size buttons & a nifty rotating dial to select a non-preset bet size when needed. Also, the way it's set up it's difficult to mis-click or apply actions to the wrong table.