Again, housings or actual lights?
I've switched from 7in so I've been through this.
If housings when I looked into it it's hard to get better than Caterham OEM between quality, fit and adjustments but they are expensive.
If lights, I'd recommend just pretty regular eBay LED replacements between $40 to $100. Work great and look great. Many styles from you to chose from, one imitating OEM new Caterham design.