Is it possible to buy pressure-treated round post 80mm and 100mm approximately 3 meters long?

[Grillen]

I have a Hörby swing set that I plan to complement and expand (see image below). I need to add 2 or 4 legs (80mm) and a long crossbeam (100mm) that I can cut into 2 smaller pieces or 2 short ones. But when I ask Hörby retailers and Hörby themselves, I only get the response that it's not possible and I need to buy a complete new swing for between 2000-5000 SEK! I've looked around but can't find anyone selling 80 or 100mm in those lengths, can it really be that there's nowhere in our long country to get them? Has anyone seen if it's possible to get hold of them?

 

[thomas33]

Does it have to be pressure-treated?
There are other ways to protect wood above ground.

 

[Grillen]

Well, naturally, it will work with the regular ones too if there isn't any pressure-treated. But it would have been best if it was the same as the rest of the structure.

There are around poles otherwise 80/100mm. I believe the legs (80mm) are 2500mm and the top beam (100mm) is 3000mm.

 

[Leif i Skåne]

Exists around post otherwise 80/100mm. I believe the legs (80mm) are 2500mm and the top rail (100mm) is 3000mm

They exist in 1,000,000s then they are called 3 m pulpwood.
Ask a forest owner, the value is a few tens each
https://www.sydved.se/skogsbruk/salja-virke/leveransbestammelser-massaved

 

[Dan_Johansson]

Construction timber is available, usually 100x120 ... then you can just round off the length you need to fit it into the pipe ....