boron sources

hit the asian markets today looking for dried plums, which best i can tell are the same thing as prunes? found them, but of course the health police have got it covered. all are loaded with bad preservatives and other toxins. found some imported prunes. dowsing is almost totally shot because of what is going on with treatment, so looking for some info here.

i remember somewhere that gse is rich in boron, but now can't find the info. can anyone confirm or refute? also, internet claims that raisons are another good source. finally found something called a chinese date, different than western dates, that seems to test high in boron. but with dowsing so off, can't be sure. anyone care to field a guess?

Thanks much,
John