We don't carry replacement bulbs, but that doesn't mean you're out of luck.
There are a number of websites that specialize in bulb replacements of all types no matter how exotic. To find a match to your bulb, remove it and look for any numbers printed anywhere on the base or on the glass. These will guide you to the correct replacement. The websites are very helpful, with illustrations for more than 99% of the bulbs.
www.bulbman.com - look in "Light Bulbs" and "Specialty Lamps"