The venerable Mouser catalog should be on your list of recommendations. Mouser provides electronic components with no minimum purchase required. I don’t know why Mouser is seldom a hit in Google searches. But if I want anything from neon indicator bulbs to video cabling, Mouser is my first and usually last stop. Their complete catalog is searchable online and is viewable as PDF pages. They offer a huge range of shipping options (using five different carriers) and charge only the actual shipping cost, no “handling.” Until relatively recently, you had to telephone one of their operators to place an order, but they now have online ordering in place.