If you're okay with ebay, this wig
or this wig
might work. Their shipping can take a little while (I've had wigs come in under a week and up to 3 weeks), coming from china, but the seller's solid. Their wigs come out bright but not overtly shiny in pictures and are pretty easy on the tangles. As far as their heat resistance, it's definitely there, one of the purple ones I ordered survived hot glue and an iron with no damage (other than the glue itself of course).