Firstly, WELL DONE - two live kids!

If you are planning to keep the boy, bottling him (and probably the other one too) would be the best solution. In the worst case scenario (the dam doesn't get back up again) you will have the kids already used to be fed by you - getting older kids onto the bottle is much more difficult. You may have to be quite pragmatic here re the chances of mum getting better.
For the one that doesn't take the bottle - tube-feed (like lambs) with colostrum as much as possible, once he is past that you can let him get quite hungry, and I would take them out of the dam's earshot, completely. I have found it easier this year to just offer 4 feeds, I used to do 5 in the first few weeks, but found they went for fuller bottles more quickly if I stuck too 4 feeds - 7am, 12noon, 5pm and 10pm.
Can you get enough milk out of the dam for both kids?

you can get the kids sorted, after al this hard work!