...Or if you're specifically looking for the drop a Jaguar offers, could try one of these (logo polished off, run upside-down) http://www.ebay.co.uk/itm/System-EX-High-Rise-Upright-Handlebar-Stem-1-1-8-Ahead-/120640733449?pt=LH_DefaultDomain_3&var=420054447314&hash=item1c16bf8109 before going to the expense of converting to threaded. Nowhere near as nice as the above, but will provide similar geometry. I ran one for a while in summer, but not with drops (https://instagram.com/p/qPs9GvlmuP/?modal=true).
@Lukas started
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...Or if you're specifically looking for the drop a Jaguar offers, could try one of these (logo polished off, run upside-down) http://www.ebay.co.uk/itm/System-EX-High-Rise-Upright-Handlebar-Stem-1-1-8-Ahead-/120640733449?pt=LH_DefaultDomain_3&var=420054447314&hash=item1c16bf8109 before going to the expense of converting to threaded.
Nowhere near as nice as the above, but will provide similar geometry. I ran one for a while in summer, but not with drops (https://instagram.com/p/qPs9GvlmuP/?modal=true).