What are some of the best places for buying components for homebrew
equipment, these days?

I'm looking for places with good stock, good variety, and good websites.

Right now I'm mainly looking for B&W Miniductor stock and transmitting
capacitors, for making antenna traps, but I'm also looking to build a
linear amplifier for use with my FT-817 ... and after that, who knows?

I've lost track of the good places over the years, and many of them have
gone out of business, so any suggestions for the current best places would
be much appreciated.