what size is ur bowl 14mm or 18mm? all you need is one of these http://www.ebay.com/itm/Domeless-Quartz-Nail-W-18mm-Male-Quartz-Joint-BEST-QUARTZ-DAB-/261541084926?pt=LH_DefaultDomain_0&hash=item3ce5103efe and there u go for $9 u can now dab off ur bong.
Hey !! Go to ur local headshop and pick up an glass on glass 14mm converter ( I prefer the GEAR reclaimer piece so you can save the dabs that fall ) then get yourself a reversable titanium nail and a 14 mm dome . .... or easily solve this by getting one piece ... a domeless titanium nail .. those work dope ! dont forget to pick up a dab tool and a silicon container to easily manage your concentrates . Happy 710 tokes