I'm still looking for a 150 mm stoker crank arm set and came across these on the St. Johns St. Cycles website. Thorn makes a complete line of bikes and tandems, plus components, including tandem cranksets starting at 140 mm and increasing from there in 5 mm increments. After juggling waved taxes included on the list price against the shipping costs they appear to be priced at $158.00 for stoker cranks only. This is still $100.00 less than anything else I can find and thats limited to daVinci at $260.00 and TA Zepher's at about the same price, but I havn't heard back from them (Peter White)so I'm not sure if 150's are even available through them.
Is anyone familiar with the Thorn line? If so, I'd love to hear what you know. My wife says "Nuts to that, buy the daVinci's. Colorados just up the road compared to London if we have a problem." Certainly something to consider. Again, if anyone knows of another source of stoker, 150mm set, I'd love to hear about them.