Its easy enough to go with a headset spacer cable stop. They can be purchased for less than $5. I like the stems Oddjob has picked up from Amazon. They make bar changes super easy.
All the bikes I own, the one that gets ridden is the Cimmaron drop bar conversion. I have short legs and a long torso, so the longish top tube is not a problem for me.
I usually add small misc parts like this one to larger orders to avoid shipping charges. Lots of versions of this style of stop.
http://www.niagaracycle.com/categori...justable-steel