Extremely short focal length eyepiece

[Toddylamo]

I am looking for a short focal length eyepiece (<2.5mm) to push the magnification up on my NP101 telescope.

Ideally:
- TeleVue Nagler 2-4mm zoom
- Vixen HR 2mm or 1.6mm
- TeleVue Nagler 2.5mm

Happy to pay, or trade for a Nagler 3-6mm