Welcome!
Yes they did have other colors, I have a green one myself. Bulbs are easy to change, you can't miss where it's located under the hood behind the white lens. Push lightly on the bulb tip and turn to right or left and out it comes. 12volt I believe. Take it with you to make sure you have the right voltage and correct base, they also come in different size bulb with the same voltage so check the actual size of your bulb.
I wouldn't get too bent out of shape over how many responses you get on a thread you post. There are a lot of reasons that can affect how many you get and having nothing to do with you personally. Some weeks there are lots of threads being posted which can push yours down the list in virtually hours. Since a lot of people will check the top for any new posts first, then if they have time they'll follow up on others . So if your thread hasn't had a response in a day or two, it can slip down the page real fast. You can bump it back up by responding to your own post, you already know that.
Just depends mostly on how busy people are with their lives, not everybody comes here on the daily. Some people here will start a thread and show what they've acquired or how a project came out, but for some reason they hardly ever will get back to anyone who has a question or comment for them. So I figure they just want to show their goods and move on.A one-way thread.Whatever, their choice.
You will find this group of members to be a treasure trove of information. Many have their own or had their own vacuum store/repair shop. Others have more information and lists and catalogues and advertisements than the actual company itself.So enjoy the bounty!
You have a good strong cleaner there. Keep an eye on the belt, change it when it stretches or cracks and don't wait until the bag pops to change it. Check the roller for long hair, strings and thread, anything that wraps around the ends can slow it down causing the belt to heat up possibly and affect the bearings in some cases. I store my extra belts in a zip lock bag to keep the rubber fresh , especially the round belts like Hoover and Eureka use. Billy