Headset help

Can anyone help, I’m being dumb! I need to replace the headset on my 2017 model Whyte T130c works, a search shows (can’t read details off original bearing) that the oem one is an Fsa number 42 integrated orbit zs plus                 1 1/8 – 1 1/2. So  as I intend to keep the bike for years yet I thought I’d treat it to a Chris King headset, I measured the upper bearing outer race at 41.8mm and the lower at 52mm, looked on the CK site and it looks like they don’t do anything to suit, so plan b, fit Hope, I think I need an Hsc8 upper and HscJ lower but am starting to get a headache, can anyone confirm if I’ve got this right?

Cheers

Paul

I’m pretty sure my FF29 uses a FSA no.42 headset, and when I built it I wanted a nicer one but no one made the correct one to fit. So I stuck with the FSA.

Op did you find anywhere that stocks the hope hsc8 upper headset, struggling to find anyone that stocks it.

Wiggle Brand X integrated tapered headset is £12

Lbs have ordered me in the bearings, but wrong ones came, so waiting on correct bearings to come from Hope.