[OZAPRS] OS use of radio like Yaesu VX-8GR

[Liz]

Has anyone managed to send out a legitimate APRS signal in another
country?
If we use the Yaesu VX-8GR in ZL, the correct callsign would be
VK2XXX/ZL but it doesn't allow that many digits.

I've got a TinyTrak MT-AIO but it won't allow me to put any letters
after my callsign either.

Has anyone any ideas (other than get a ZL callsign for 2 weeks?)

Liz
VK2XSE