Looking for Kre-O helmets in fitting colors

[ZORK64]

So, I've recently updated my original LEGO Transformer (his name is Warhawk) and I'm happy with it, except for the head (at first it was Hero Factory Surge's head, now it's Bulk's head), which doesn't look like the head that I imagined (something akin to Optimus Prime or Soundwave).

While I initially thought that the Kre-O Transformer helmets would be too big to fit, it turns out they are a well fit, so I could actually use a Kre-O fig head with a red visor (like Singe's, which I happen to own) in combination with Kre-O Optimus Prime's helmet to give the head I want him to have... but there's a problem (and I'm not talking about the issue of robbing the little adorable Kre-O Optimus of his iconic helmet): The colors don't match!

The blue of my Kre-O Optimus Prime is visibly darker than the regular blue (I believe the proper name of it is "bright blue"?), so the head stands out even more than it really should. However, I do know that Hasbro at least uses in some sets also a blue that is much closer (if not outright the same) as good old LEGO blue, as the Kre-O Bluestreak I own is bright blue. Looking at the articles on TFWiki.net, it looks like that Optimus and Soundwave were produced and released in various colorations, but it's hard to determine if any of these redecoes are in the blue that I need.

After all this long explanation, it's time for me to ask my actual questions:

1) Did Hasbro ever produce the Optimus Prime (or Soundwave) helmet in a shade of blue that is identical to the regular LEGO blue?

2) If not, are there any similiar helmets in the Kre-O Transformer Line in the fitting coloration? It must have a faceplate though.

3) In either case, what's the best way to aquire Kre-O Parts? Especially if I want to make sure the parts are in excellent condition, preferably new?

I hope you can help me with this rather specific request. If all else fails, I can always go for the Jango Fett helmet, but still, getting a proper Transformer helmet would be great in that case.

Edited September 9, 2015 by ZORK64

[LuxorV]

As this discussion is about Kre-O parts availability and not customisation, I'll move it to Community.