Hammers should be no problem for dwarves, 1/4 have e4, or get them using boots. However, I assume you mean
Ulmish smiths, which people repeatedly refer to as dwarves for reasons I can't fathom.
While I don't intend to lower the cost of hammers (they are still a incredible deal if you can get them), I do plan to help Ulm's access to them by separating out the smiths 10% earth random from the astral/air/fire. With 10% of smiths getting e3 (and you should be pumping these like crazy anyway) you would have to be pretty unlucky to not be able to reach hammers via boots.