Comfy saddle and seat post

I acquired a KH 29" uni in a trade, but the seat is terribly uncomfortable for me (KH fusion zero) and the seat post was cut too short for my riding height. The seat post is 27.2 mm diameter.

I’m looking for a comfortable saddle (read: soft - I just can’t get with these bike-like firm performance saddles) and seat post to match. The uni is well used so I’m trying to avoid shelling out too much $$$ for new parts just to make it rideable. I’m OK with well-used equipment so long as it’s still functional.

Thanks! I live in Chicago.