I've gone S type on my 18z and its quite expensive to do so. I got them from Engcon as I really rate the quality and light weight of their buckets. Paid the following all plus vat;
S30 Manual hitch c/w lifting hook £1200
GB01 800mm grader £350
600mm Digging c/w teeth £450
450mm Digging no teeth £300
240mm cable bucket £240
The idea is to be able to share attachments between the 8026 and the 18z, whilst each machine has its own dedicated bucket range (the 18z's being smaller for obvious reasons) But for £2500 I could have bought standard buckets twice over, so I don't blame anyone for sticking with traditional buckets, especially if they haven't already got S type in their fleet.