so i got a weller wlc 100 and i was looking on the bay for tips and i found this
http://stores.ebay.com/Feld-Electronics-and-Hardware?_trksid=p2047675.l2563this guy has hexacon tips that fit the wlc100 perfectly and he combines the shipping on the tips
i bought quite a few and can attest that they fit the iron perfectly
i have yet to use them but considering that hexacon is an industrial supplier with a pretty good rep these should be good to go
look for the 1/4 inch tips for the wlc100
