You may want to wait for someone else on this one as I would hate to steer you wrong. However, if it were me I would put them into a solo cup or something similar as soon as you think you can move them without killing them. They are very, very fragile at this age. You will most likely need a spoon or something similar to make a nice circle around them and move them one at a time. Just be very, very careful not to crush/cut/disturb the roots. Easier said than done since you can't see inside the dirt. Go a little bigger than you think you need and don't rush it, take lots of time and do it carefully.

If you do decide to give it a shot, get it all set up first. I will give a quick explanation from a post I read about re-potting (I think on this site). Get your cups/pots (what ever you are going to use and put soil in the bottom. Then use the old container (which you don't have of course, but you will next time) or this time maybe put a smaller cup in there and fill the dirt around that cup. Once done pull the cup out leaving a perfect fit hole for your plant to fall right into without stress. Then place a bit more dirt on top to level out the pot leaving an inch or so for water to go when watering. I found that post and have transplanted 3 times using it. My plants never looked stressed. They say they need 1-3 days to recover and start growing again. Mine took off the very same day, very happy in their new home. You don't even need to break up the root ball, just out, in and water. Since you use the old pot (when you have one), it fits inside the hole you made perfectly without having to press, force etc.

You can search for the post for more explanation. If you give it a try good luck. The ones that make it will be very happy.