You can make ender pearls pretty easy using MineChem.
You need one Einsteinium and 8 Calcium Carbonate
Calcium Carbonate = 1 Calcium & 1 Carbonate (ion)
Carbonate (ion) = 3 Oxygen & 1 Carbon
Carbon is in coal and a lot of other things.
Oxygen is in a million things, stone, reeds, cobble...