Western Accessories in Krugersdorp have brand new 10000 FG.
Just tell your friend that the Sustain FG is now the old generation and parts might be fun to find if required.
Even the Sustain FI like I have has been around since 2017 & I suspect that we may see a new Sustain this year (based on history - Sustain follows the Stradic by about a year) but who knows, it may be dropped?
Give the new Saragossa SW-A or Stradic SW a serious look (Stradic SW in 5k and up sizes is not related to the Stradic FL at all)
Both will be way better at shrugging off splashes and immersions (not winding under water) having body seals and o-ring seals at water entry points