Did that. Is this not a working list?
Sure, you just generally get a better response with a more targeted
request. The people interested in helping clean up BLPs hang out on
BLP/N, so that's the best way to reach them. Posting to this list will
probably work, but I think posting to BLP/N would work better. Posting
to both is probably unnecessary unless the first one you tried has
gone without response for a while.