How do I find a pair of pants to match my Armani jacket?

I recently picked up an excellent Armani suit jacket at a thrift store for $20 (I found a tag inside a pocket that showed the original price for the suit, $1700! quite a deal!). I was wondering how to go about finding the correct pair of pants to go with the jacket. Are there any stores out there that could take the info from the garment tag and find me a pair of pants in the right fabric?|||Armani Exchange! It's a tiny splurge, but worth it! A worker can help if you have a store nearby, or go online! Awesome clothing there, Awesome!|||if you cant find a pair of pants with matching fabric wear the jacket with jeans