https://www.amazon.com/Transformers-Generations-War-Cybertron-Micromaster/dp/B07D5TGCKC
They are just a micromaster 2 pack that came out a while ago. I also found out about them a few months ago and it’s such a great addition to nearly any decepticon. Cheap too I got mine for like $10 on eBay new in box. Above in an Amazon link as well.
I believe wish and Amazon have mini packs for like 30 dollars. There's like 30 pieces and they are generic and not painted but not to bad for price. We've got two and they're pretty neat really.
This could be a solid option if you can find it for a more reasonable price