I lost one of the spikes to my Silver Signatures and B&W sent me one for free, however they did want $2,400.00 for replacement crossovers. I assume that you've already contacted them directly.
I've since replaced my spikes with AudioPoints (www.audiopoints.com) and they sound even better. May be cheaper too. They will know the size you need.
Chuck
I've since replaced my spikes with AudioPoints (www.audiopoints.com) and they sound even better. May be cheaper too. They will know the size you need.
Chuck