I would give DIY jumpers a try. If you can use the same speaker wire as your long runs try that first.
Custom jumpers?
Are the stock gold jumpers for Bi-wirable speakers any good? I was wondering if short runs of high quality speaker wire between the posts would be better? Of course there is the possibility that I'm a complete weenie who thinks about this stuff too much and I should just not worry about this kind of crap!!!