Hello and welcome again, to WhatNext. We have a great search feature that will allow you to search our database of WhatNexters and match by stage, area, age, etc. Go to www.whatnext.com/users and then use the search bar to enter the type of cancer, stage, and other filters you may want. This will give you a large list of people on the site with the criteria you want.
Give that a try and let me know if you need help!