I have seen a few pairs for sale over the years Roy (always mega money). They were issued as a 'kit' to dealers to improve sales on the Bomber and I guess a few sets will have languished in dealer stock rooms. DS scours the States now buying up old dealer stock and he's built up loads of contacts. I suppose when he buys someone out 'lock-stock & barrel' he must come across quite a few tasty morsels like those, which have been forgotten about. He was selling a bomber with those pipes on last year...I think he was asking around £10k from memory.