Does anyone know if it would fit my mkII Octavia Estate?

fit straight on but keep in mind that the Octavia has a heavier rear end than the Golf so the springs from a Golf may cause a lower rear end.  Sway bars, dampers, bushes, suspension arms, etc all fit.

It's a set of coilovers I have seen, thought they might work.

Non technical answer, but I found the suspension on my Mk 5 Golf GTI significantly firmer than that on my vRS.

It's a set of coilovers I have seen, thought they might work.

They should be fine.  

 

Saggy bum can be adjusted out with a bit more preload on the spring.

 

My Koni Yellows are the GTI partno as i bought them from the USA & they wouldn't know what a Skoda was.

 

The RARB is off a GTI (and modified to be even stiffer)

 

The lower control arms & console bushes are off an Audi S3.

 

I love the way the parts interchange.

Yes, the Mk 5 golf suspension fit on Audi A3, Seat Altea, Leon and Toledo, Skoda Octavia Mk2 and Yeti, VW Jetta, her is a cod 312267 SACHS.