It's typically one of those specialist items that isn't really that complex, but Honda want far too much for.
They look something like this...

But at £17.75 for each bolt, £7.45 for a cam washer and £7.61 for a frikin nut! Totalling £65.62 for both sides I'd like to see if there are any alternatives

Part numbers are:-
52387SE0023 BOLT, LOWER ARM ADJUSTING
52388SE0030 PLATE, CAM
90216SE0305 NUT, RR. LOWER ARM, 10MM
Alternatively I have a set of these I can fit...

The ball joint end is catered for...

But do they require just a generic nut and bolt on the cross member end?...

@RattyMcClelland @si import @4thgenphil @Merlin?
It's one of those things I won't know until I get down there and offer it up, but then I need to be prepared. At the same time, as they didn't supply the bolts does it use the existing?