In theory, elves should be able to make ceramic goods, (but not bricks, since that isn't their way), and should have access to polished loose stones, (but not mined gems, because that isn't their way). Things like that.
Possibly silk from vermin spiders, et al, but in tiny quantities.
I am also of the opinion that they should have "Cold workable" metal tools, such as pure copper. (alloys are out of the question, and iron and pals cant be cold worked. Copper, gold, silver, (and to some extent, native aluminum) can all be cold worked though.
Basically, the metal is collected in its raw form, then gently heated. (The source of the heat that is compatible with elven ethics could be manyfold, including compost pile heating, or simple solar heating using hammered mirrors, since the heating does not need to be above melting point) This anneals the raw metal chunk, making it workable using cold working methods. As the metal gets worked in this state, it hardens.
http://en.wikipedia.org/wiki/Work_hardeningEG, to make a hammered copper mirror from a native copper nugget, an elf can use a wooden anvil and a wooden hammer (assuming hardwoods are used, and that they are heat processed to harden the wood--
http://en.wikipedia.org/wiki/Fire_hardening) to hammer out the sheets of copper. Said mirror can be used concentrate sunlight sufficiently to anneal further copper work, without the need for a fire at all. (Initial heat sources, again, could include heat from a compost pile to get this initial copper mirror)
Since a fire hardened wood surface can be "harder" than copper, such tools could be used to work copper.
The rarity of natural copper nuggets would mean that such copper crafts would be closely guarded by elves, and not be a trade good-- however, I can easily see elves working copper within their ethos.