Welcome to the BYC flock! We are glad you joined us!
Congrats on your first post, but very sorry regarding the circumstances.
Are you looking for any particular breeds, other than being cold hardy? You could try posting on Craigslist, or once you have 20 posts on BYC you can post in the "buy/sell/trade forum". There are also several hatcheries out there that sell started birds, as long as you don't find shipping costs. Another option would be to use the search bar above to search for your state's thread and see if anyone on your state's thread have any for sale near you. Whatever you decide to do, I would still give the advice that you quarantine the new birds for at least a month before introducing them to you remaining hen. You never know what pests, parasites or diseases new birds can have, even when they are coming from reputable people.