I managed to get this long wheelbase extender bar from a Saris dealer in WI, for whatever reason they don't make it anymore:
I'm confident this would've worked to carry the Clem, but I ended up not getting the 64 Clem (I imagine it will come up for sale soon and make a tall rider very happy. Tom is a list member and he was the most gracious to work with even after I backed out of buying it... I think I'll regret it, the price was right and the bike was beautiful)
To close the loop, I ended up getting this Xtracycle Medium Mtn Rosco Bubbe in rainy Boston last night! (apologies for the bad photo)
It'll be a kid hauler, grocery getter, commuter, do-everything-bike. The frame has switched hands on the list over the last years and the seller was great (thanks Peter), he is a Riv fan just 30m from my place. It's a joy to ride and even though it's a smaller frame than I'm used to, I will be able to share it with my wife which is awesome.
It's insane that two of these rare beauties showed up in each coast at the same time. Someone go and buy
Drew's - if it's still up for sale - it rides like a dream!
Max