Are these standard bearings I could pick up from any bearing supplier, or specialist items??
Probably not from a generic bearing supplier, but try Wych Bearings as they supply Enduro bearings who do various headset bearings.
https://www.wychbearings.co.uk/MH-P21.html
https://www.wychbearings.co.uk/MH-P08F.html
Any bearing supplier
You can pick them up from many places via their part number codes (the MH-P number), loads of good places stock them, and lots of other manufacturers do them cheaper.
👍 Cheers!
Get all our Specialized bearings from Trailvision, used to be called Blue Seal. Been using them for years. He's very good with enquiries and usually arrive next day
They come packed with marine grade grease
Have you taken the old ones out to measure  them , the diverge has a few different versions over the years. <br /><br />Those P08f and p21 won’t fit the diverge with the future shock spring thing under the stem
Have you taken the old ones out to measure them
Really good advice. Take the old ones out, photograph the numbers.Â
Sometimes, a good clean and new grease will keep a headset going. It doesn't have to rotate the same as wheels or bbs.Â