Electric fence posts/tall stakes (Brent Knoll TA9)

Hi all, thank you for reading this.

I have a small animal sanctuary and use electric poultry netting to (try and) keep them in. I wondered if anyone has the plastic posts with notches/hooks, that support the netting, that they do not use anymore? I would be most grateful although the animals won't as they have a great time escaping and then being given extra food to try and get them back in!

Any related items would also be most welcome such as ground pegs, batteries, fencers - although the latter items might be a bit ambitious.

Pic is an approximation of the item - they do vary quite a lot.

Thank you so much