[ALR-bishop]

I have one but it is part of a full set of 396. This is the hardest Topps set of the 80s, and one of the harder Topps sets period. ( I know since I built them all).

The Henderson unfortunately is a C sheet card which apparently only appeared blackless in packs in Michigan, and are some of the hardest blackless cards to find. It can be found completely blackless and with a partial gray signature visible. Not sure what you are thinking of as top dollar The SCD Catalog for 2011 lists it for $ 150. I paid more for mine

You might contact the ebay seller crystalentia. He knows more about blackless cards than anyone I know and usually has some for sale. You can find him now with a search for Topps 1982 blackless in completed listings on ebay. If he does not have the Henderson he may have contacts who do. I know one other guy with a Henderson but it is also part of a full set, the only other full set I know about