Being a DIY sort of guy, I found a use for 2 of the telescopic "selfie sticks" you can buy cheaply these days. Instead of using them to take and post inane pics of self on Facebook, why not make an infinitely adjustable AB stereo bar instead !
I had a Chinese copy of a Manfrotto Dado half-sphere (the red object supporting the 2 arms) and with the use of a few thread adapters I was able to screw the selfie sticks into the Dado ball, attach another 3/8 to 5/8 adapter underneath to attach it to a mic stand.
Because the selfie stick uses typical camera 1/4" thread for the ends, I found some 1/4 to 3/8 adapter bushes to allow me to fit the Rycote supports. The pictures tell the rest of the story.
* infinitely variable size, because of the telescopic (like car radio antenna) segments you can pull out exactly as much as you require to provide your desired AB dimensions (no more long bar required even if you want a short one)
* cheap, easy to make, lightweight, ends have adjustment via finger clamp and thumbwheel to point your mic where required, can be dismantled for transporting, maximum extension is 1.7 metres ! You could even add a 3rd stick out front and made a Decca Tree (the easy variability of lengths lends itself to Decca Tree experimentation, and it's lighter than most all other commercial Tree designs )!
Bad points: as made, the minimum width is 50cm, which may be a little too wide...I'm planning to perhaps shorten it to give me a 35 cm minimum width
At full stretch (1.7 metres) the ends sag a little...but most folks wouldn't require such extreme width ?