Do a Google search on bronco bass mods (or modifications), there's lots of threads about it, with tonnes of advice. Loads of options available!
I recently switched to short scale, picked up a SX spb62, which is really well made for a bass similar to the bronco in price, upgraded the machine heads and bridge to Wilkinson, and dropped in some SD Quarter Pounders, Daddario half wound strings and it's a beast. Neck on the SX is super slim and nice to play.