You use this and mount on a cymbal stand...on it you could use the "L" from your current tom mount:
Or get any one of these:
http://www.musiciansfriend.com/drums-percussion/ludwig-elite-tom-holder
and make sure it has the thinner 9.5 mm post:
http://www.interstatemusic.com/34671-Gibraltar-Mounting-System-Ball-w-9-5mm-Rod-SCLBS.aspx