Any source for the Anycubic Kossel Plus?

Hi, I got a DIY-printer (one that never worked down to the 1mm range) and a Ender 2 which does an okay job. Now I need a buildvolume >30cm for the z-axis and I noticed the Anycubic Kossel Plus uses not only linear rails but also 2020 extrusions. From the videos online it looks like the linear rails are only used 2/3 of the length? so I could get atleast additional 10cm in z-height? The manual states 680mm 2020 extrusions with T-slot B-type, can somebody comment on this? I would buy 3x 780mm extrusions instead to get ~40cm... sounds like a plan?
Main prob: I can't find a seller for the Anycubic Kossel Plus in central Europe.... Covid19 probably killed the supplychain? Anyone around who can give me a hint where to look?
Or perhaps somebody knows another similar good printer with that buildvolume?

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