Hello again, FlowerLady,
There are online seed companies that have extensive selections of zinnia seeds. One with an extensive zinnia offering is Hazzards.
https://www.hazzardsgreenhouse...
Another seed seller I patronize is GeoSeed. Their main catalog doesn't have pictures, but they have an extensive offering of zinnia seeds as well as seeds in general.
https://geoseed.com/
I have also purchased zinnia seeds from several other seed sellers. Shopping on the Internet can be very productive, as long as you take care to avoid the bad actors.
By saving seeds from your favorites, you can become your own best seed source.
ZM (not associated with any product or vendor mentioned or linked)