ReLactation

I want to try to breastfeed again. I had milk for two weeks and then it dried up on its own while I was still pumping since my little one wouldn't latch. Now 9 months later I want to attempt to get my supply back and have heard a few success stories. I know it's extremely weird since my child is about to be a year old and will be weaned off the bottle anyways. But I wanted to freeze the milk for milk popsicles for Teething..... has anyone successfully relactated? And if so how'd you do it? Can this be done without buying a bunch of vitamins and supplements you have to take? Can it be done exclusively pumping???