You either need to get lucky converting your level 40+ gear or buy them. Then you have to get the right catalyst for the meld. Grade 3 I think, since your doing whm weapon you need a 50 carpenter. They will meld for you. You simply request a meld and it will allow the crafter to meld your weapon. You dont even have to give them the items or weapon for them to do this. A lot of crafter ask for tip or charge around 1-2k per meld. Hopefully you have some FC members or friends who can do this for you. If not a /sh or two should find you someone. Good luck.