You could widen your shed doorway? Or saw a bit off the ends the mirrors? Seriously though, adjusting the Zefal Cyclop end-bar mirror after folding is something I've become used to, but agree it's a bit of a pain. The Zefal Dooback on the left simply clicks back into it's perfect position, but I can't have a Dooback on the right because it'd just break like the last one did (although breaking it did take a huge effort on my part doh - if it wasn't for Araldite holding on a big plastic reflector to it's front, that break might not have happened), because of how my bike folds. It's all swings and roundabouts/tradeoffs, but what's important is that your new mirrors fulfil their function well on the road. You could have kept one easy click-into-position Dooback for the left, and installed one long Zefal antenna mirror on the right.
Ebay doesn't care if you're returning products to the same seller for a refund. You could really p*ss him off by returning the left antenna Zefal and buying a Dooback back, for the left, which would halve your adjustment time, as the left Dooback would simply click and fold inwards to get your bike into the shed more easily, then click back into correct position when you take your bike out... but then your bike might look like an injured insect, with just one antenna