Barry - check on www.thelighthouseinc.com & you might find it. I'm really not sure what % of their catalog is online, but their paper catalog is at least 12" thick. Even if they don't serve your area, you can be sure there is a similar place where the fleet shops & independent parts houses buy their supplies. Also, I have seen bulb mf'r. catalogs in wholesale elect. supply stores like where bld'g. contractors go to.
Determining the 'base' configuration of your bulb & the wattage (C.P.) will be helpful.
Doug