i need the yellow ones but cant find them anywhere mine e4
If by yellow you mean gold, Im not sure there is.
Gold was part of the mini mono brake set
That said, there is a bore cap compatibility chart which might show if the earlier will fit the later.
One issue springs to mind, which is some of the bore caps, as on my V4's and possibly you're E4 is those thee caps screw on from the outside, where as some others, like the Tech X2's screw in from the inside.
Compatibility chart - And sorry, but i doesnt look like it
The only option you really have here is to take a small pile of components, and sent them to an anodizers who will strip the undesirable colour and re-anodize to however you fancy.
We'd a bloke over on RetroBike who did some work for me anodizing for early bike bits, but that was a hobby for him and he stopped doing it, and in fact im not sure he's on RB any more.
Of course, it will take a bit of figuring out, a few small bits to buy, and you could do them yourself. Which I'm more than sure you are capable of.
One thing to note there is the RB chap told me after he did mine that despite me stripping the old ano(you do it in a strong solution of caustic soda drain cleaner) was I hadnt fully rinsed off the caustic, despite me thinking i had because i really rinsed them i thought, and that if after stripping you polish any roughness that stripping has caused, there was still residue of the metal polish(autosol)
So if you do decide to give it a go, really scrub at the stripped part in cold water to make sure any polish or caustic is gone as that can effect the finished product.
I remember what the job was. The first set of Hope tech X2 you couldnt get the parts in purple, and i wanted purple, so had him do them instead.
I should have a pic of the bits he did ...
