Piercing with an allergy to metal question. Gold, Bioflex?

[Undercover Doll]

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I have an allergy to nickle.
But wearing stainless steel and surgical steel bother my ears as well.
Right now I have cheap glow in the dark plastic in my ears and it sometimes produces a little bit of "The crusties", it's not much... but it's still something to consider. Can that happen based on what kind of plastic I might have as well?
I'm looking into buying bioflex for my ears right now.

I am interested in getting snakebites as I have wanted them for several years, but I know that metal in and around my mouth would not end in good times...
So I have been looking at some jewelry online and I don't know if I should purchase some gold lip studs or bioflex.
Or are both bad for the initial healing process?
And could I get it pierced with an 18 g?
Or should I go for the standard.

Links to what I was looking at:
Bioflex
Gold

Also, what are some reputable jewelry sites?
I don't know how much I trust this one with quality.



<3
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*Please quote me to get my attention!*  

[Nekojin_cat]

You could probably go for titanium or niobium jewelry? Most reputable piercers will offer a (probably limited) stock of jewelry in both metals, but they're both very rarely allergenic metals, pretty much totally inert as far as I understand it.  

[nevermore1337]

titanium or bioplast/ptfe is what i have to use. i have nickle problems too