I just want to pass along that you do not always have to go to the Slingshot aftermarket parts stores. A LED headlight conversion can cost as much as $199 at such sites. I went to ebay, got the H3's (outside lights) for $12.89 and the H9 (inside lights) for $34.19 for a total of $47.08. Shipping was fast, ordered Monday had them on Thursday. I am very pleased with the outcome and love saving $150.
Link for H3 : H3 Fog Lights LED Foglight 12v Car Upgrade Conversion Bulbs kit 60W 6000LM White | eBay
Link for H9s : 2x LASFIT H11 H9 H8 LED Headlight Bulb Kit Low Beam Fog Light 72W 6000K 7600LM | eBay