Unfortunatey, I don't know of any websites that provide this
information.

The good news is I have found it in a couple excellent books. The
information about this particular subject (mercury toxicity
indicators in blood work) is not comprehensive in each book, but each
book does cover it in enough depth to give the most common cases a
good degree of confirmation.

The information consumes several pages typed in both books so it's
too long to post here plus that would be a copyright violation, but
if you're interested, I have both of these books and they're the best
I've found on the subject. In fact, of the 8 health-books on my desk,
these books consume 2 of the 8 slots.

Amalgam Illness: Diagnosis and Treatment by Dr. Andrew Cutler
http://herballure.com/vp/aidt

It's All In Your Head by Dr. Hal Huggins
http://herballure.com/vp/ayh

Hope this helps.