Simply Bearing , Bearing Boys or Fleabay are all good sources for quality replacement bearings and seals here in the UK.
All standard sizes so shouldn’t be too hard to find, replaced all the bearings and seals last summer when I put a new set of tyres on, just seemed to make sense with the wheels off.
Invoice is a screenshot from vxb.com. If you check the part numbers on the first post Steve posted, they can be verified against the touring for fitment to confirm.
Ordered new ones since old ones must come out for powder coating of rims.l, not because of wear.