CC plan just for Fireworks

Ive had a sub to Creative Cloud all apps plan for a few years now just to use Fireworks. I only use it a few times a year and the $50 a month is starting to add up. Since all the images I use on my websites are fireworks PNG files i'm pretty tied to fireworks. Is there a cheaper CC plan that would allow me to continue to use fireworks without paying for the full suite which I never use? Ive searched for an affordable copy of CS6 but seems like only eBay sellers have it and I don't trust buying software like this second hand, which is why Ive been paying for the cloud version for years now. All i need is Fireworks .