it's been a while since I log in into this site, so forgive me for this late reply.
Javanese is unfortunate that resources in it in english is somewhat scarce,
from what I can find there's a javanese-english dictionary by Mr. Stuart Robson (a researcher in Javanese studies) in Amazonhttp://www.amazon.com/Javanese-English- ... 079460000X
and a Javanese grammar (but this seems to be out of stockhttp://www.amazon.com/Javanese-Grammar- ... 806&sr=1-3
there's also Javanese-Indonesian dictionary by S.A. Mangunsuwito, if that can help.
and an important book that every student of Javanese must have: Pepak Basa Jawa.
while nowadays most of javanese people are conversant in Indonesian language, I like it that you are interested in learning my native language.