I usually buy a bag of 10 mixed 1.4 & 2 metre Brass scale antennae from my Friul bloke who specialises in Brass accessories. These are obviously German ones as that's all I really build and are super cheap and look great.
I'll have to get some Brit ones soon for my upcoming Firefly and Comet builds.
I used to tear my hair out getting sprue to stretch properly! Dragon sometimes throw in some half decent antennae that I'll use as well.
Ben