Unable to "bring back Coder"

I want to use pi-top Coder and not Further, mostly because I do not always have internet and Further runs like crap on the pi 3b+.

I tried to follow the instructions at https://knowledgebase.pi-top.com/knowledge/installing-pi-top-coder

I was getting an error about the package not being available.

Is there an alternative location to install pt-coder from?

Coder is not available on the latest pi-top OS bullseye, these instructions are designed for our previous OS ‘Sirius’ which you can download here: https://storage.googleapis.com/pt-os-builds/pi-topOS-sirius/release/pi-topOS-sirius_C790_2021-06-11.zip.