If you're located in the USA you can find good companies by going to one of the Travel Insurance comparison web sites. Each one of them has done a review of the companies and will only list companies that are good and that are nationally recognized.
Most insurance companies offer travel insurance. It's illegal to decline travel insurance base on age. A good place to look is a travel agency or AAA. Traveler's insurance is also a good one.
There are dozens of insurance companies that offer travel insurance. One of the most popular travel insurance companies is Travelex Travel Insurance.
Some companies that provide travel insurance for people over 75 years old are Good to Go Insurance, Columbus Travel Insurance and Insure for All Insurance. You can also contact your travel agent or health insurance company for other travel insurance companies
Travel insurance for elderly people is offered by multiple insurance companies most famously AARP offers good insurance for elderly also other insurance companies like sunlife.
There are many insurance companies that off golf travel insurance for their customers. These companies include Travel Guard insurance, which is well known travel insurance company.
The main place for travel insurance for the elderly would be AARP which is well know for providing seniors with much help. Other insurance companies offer good deals for travel insurance.
Check with your local travel agency and see if they offer travel insurance online. There are also a variety of online travel insurance companies that offer a good price, depending on what you need.
There are a multitude of travel insurance companies out there. Some of these companies include; Top Dog Insurance, OUL Classic, GreatCover, MultiTrip, and FlexiCover Travel Insurance.
You can find reviews and overviews of travel insurance on the internet. Here's a good site to begin http://www.travelinsurancereview.net/travel-insurance-101/.
If traveling out of the country it is good to get travel health insurance as your local health insurance will most likely not cover you abroad. Some companies that provide travel health insurance are FrontierMEDEX, Gobal Underwriters, HTH Worldwide, IMG, Travel Guard, and of course these are just a few.
Many insurance companies offer backpacker travel insurance, some of the companies offering are Direct travel, Holiday Safe, Essential Travel and many more.
There are a few companies which specialize in travel insurance for the elderly such as Staysure's OAP's travel insurance. Alternatively you could use the Insurance choice website.