Winding your own coils is so stupidly easy and it allows you much more flexibilty in terms of the diameter and number of wraps you want to use.
The problem is so many vendors seem to have decided to move away from stocking DIY coils in the last year so finding a decent supply is getting a lot harder.
Currently Vaping101 seem to still have a decent range of DIY coils and wire spools. I use Coilology 10ft spools. A lot of their range are out of stock but they still appear to have some Ni80 3 core twisted clapton spools which are probably what I would choose out of what's available. You can see what they've got here.
https://vaping101.co.uk/products/3192-coilology-performance-diy-resistance-wire
Or you can look though their full range of DIY coils here if you prefer that.
https://vaping101.co.uk/collections/diy-coils