Try here as well.
https://www.westfieldfasteners.co.uk/A4_Pin_Clevis_4.html
Also a source of other fixtures, bolts, nuts, screws, washers, clips, pins.
Have a browse and put together a mixture to lessen the postage cost! I’ve built up a small range of stuff that way. The stainless wood screws are great for any outdoor use, socket head bolts/set screws for places where hex heads won’t work.....

Plus Four MY23 Furka Rouge