And it has a white flower.

If it has white flowers and shaped like a birdhouse gourd, it will be one of the varieties of hardshell gourd (Lagenaria siceraria) Even the common birdhouse variety is edible as a summer squash substitute, but there is a whole array of bottle gourds grown exclusively for food.

Where can you get the seeds? She is trying to help me locate some, lol. Mine have gotten old and won't germinate anymore. I bought a bottle gourd from the grocery store since it looked similar but it was bitter. The ones I grow aren't.

Most likely you are looking for ipu manalo
http://www.ipufarm.com/catalog/ipu-heke-gourd-seeds/
http://www.kaahelehawaii.com/pages/culture_ipu.htm

It didn't show seeds for sale of the ipu manalo. Thank you though I will search further on that. They had the story about how a pot bellied man had to plant them, lol. I told my husband that would be his job. He thought I was lying until he came and looked, lol. He is from Hawaii but they call them squash. Nobody I have asked knows the real name, lol.