US Plastic is super helpful for stuff like that. I used them for my bixenon retrofit needs, as well as Tygon tubing for all my carb fuel and vacuum lines. Works great. It's even this funny yellowish-green color.
Keep them in mind if you ever need bulk plastic for things. They're not cheap because you have to buy in bulk, but they're pretty competitive on pricing when you look at their unit price and you're going to use most of what you bought.
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