Nope, there's no way to trigger the rare events, sorry. Here's a guide:
Tradeskill Rare Event Guide There are, however, items which raise your primary skill which can help (insight gives +25 to your artisan skill). The Fallen Dynasty adventure pack has quests for tradeskillers over level 50 that gives a +skill item, and the
Apron of the Artificier comes to mind. The Final reward in the
Seeking a Profession series gives a tunic with +1 to all artisan skills.
There's a list
over on the official forums.