can i buy different globes for the exo terra compact top? i have a medium one, (3 bulbs) i was thinking putting 3 2.0 in it, (does that sound ok ?? or i need something different??)

i want to find out if i can get the globes somewhere else, for maybe a lil cheaper, where else would i find them and under what name, i can not find a replacement for the life of me,