check ebay, ive found those mids on there before.
theres alot of brands making these kinda mids and highs ie soundstream, whip audio, o2, beyma, audiopipe to name a few.
i personally run whip audio mids and im very ssatisfied with them.
bullet / pro audio is what i mean, ive been looking at the selenium. might pick them up, im not sure yet. i played around with the settings on my HU and my bullet tweets sound a lil better now