While construction used to be the hallmark of the radio amateur, today much equipment is purchased as "plug and play" kit. Here's some of those dealers.
Nevada Radio - Amateur Radio Dealer
Martin Lynch and sons - Amateur Radio Dealer
Moonraker - manufacturers of antennas
MW0JZE - hex beam makers
CUG Mast Solutions - Scottish manufacturer of masts & antennas
Titanex - German antenna manufacturers
Tennamast - Scottish manufacturer of masts and more.
G-Whip manufacturers of mobile and base antennas
OM Power - Linear amplifiers from Slovakia
Wimo - German radio and antenna dealer
Innovantennas - U.K. Antenna manufacturerYaesu - major amateur radio manufacturer