Which stabilizers do I need?

I ordered a set from Amazon but couldn't tell what the ends looked like. Hopefully they are the same but if not I'll deal with it for a while until I replace the front 2, then I'll make sure they all match.

You may want to be sure the stabilizers you buy have the same `end' as the originals to avoid having to have two different cranks. Our original ones had ends with a hole which required a crank with a right angle end that would fit into the hole.
The ones we have now have a hex end that uses a crank with a socket.

Thanks everyone, I stopped by a few rv stores and I couldn't get any answers. I'll pick some up and give them a try.

Go to any RV parts store and just pick a pair up. Any will work for you. Remember, they are made to stabilize, not "lift". And "stabilize" does not mean motionless. The camper will still rock and shake a little, no matter what you do. The stabilizers keep the camper from tipping if too much weight is put on the end. That's the primary purpose.

Are you sure you need stabilizers in the front? Consider moving them to the rear and let the tongue jack stabilize the front.

Just measure to the ground and get something longer. It really isn't an exact science. Get a set that matches or exceeds your weight requirements. Going higher gets you a better built jack with superior bearings in the end.
Something to take note of is the direction that it turns to raise and lower. Different brands turn in opposite directions.
I learned this one the hard way and it was very annoying!