I was recently invited to a leadership event for my job (tech industry). The invitation calls for Business Casual attire and states, "Nice jeans and wholesome shirts are acceptable." I have a colleague who went in past years and said that he saw quite a few blazers with jeans. The problem is that the event is in a little over a week and I don't own a blazer (I only own a light gray suit and a black three-piece suit). Unfortunately, given my smaller body type, I can't find any suit coats that fit off the rack, so I have to get them made-to-measure. What should I wear to this event? Like I said, it will be in a little over a week in the midwest. I'm willing to go on a shopping spree to get clothing for the event, so any suggestions are welcome. Opinions on cardigans, sweaters, and ties are also appreciated. Thank you very much!