marc (leegeddy) makes awesome cables for a very reasonable price. also, i do believe that ian stone is making cables now too. or you could make your own, canare star quad with neutrik ends for probably around $30-$40. how good are you at soldering?
that'll get you from the mics to the ua-5. from the ua-5 to the jb3, you'll need an optical cable. i don't know how high tech of a cable you want, you could probably find a monster look-a-like thats pretty decent and fat from ebay from anywhere between $5 - $30.
You'll need a normal toslink on one end that connects to the ua-5 and a mini on the other. you can find cables that are like this, but you can achieve the same thing with a normal toslink on both ends and a toslink>mini adapter for the side that goes into the jb3. usually they can be had for cheap, around $.99 on ebay.
i used to run the same setup, i loved the superlux mics, they sound great for the price. i ran starquads and just a beefy off-brand optical cable.
good luck.