I ordered some bits from Motorapido on Thursday and that part is no long available, must be an old stock part but £7 post maybe time to get creative with a bit of rubber and a drill.
I bought these as a 'just in case' https://www.ebay.co.uk/itm/13170085...zi8SktHQf2&var=&widget_ver=artemis&media=COPY
Odd. Their webpage offers 000017847-Z as an alternative, says they've 10+ in stock. Looks the same part ?
Sorry forgot to update, I had a reply from Stein they have them with your part number but the post is 10 euro plus any duty.