I bought one of these from Leslie (eBay - user ID "htguys") thinking I was going to get a 5020 but some things came up and I needed extra money, so I replaced my 6500UB with a BenQ w1070.
If anyone is interested, I thought I'd mention here before putting it in the classifieds and on eBay that I have the filter, brand new - simply opened box to make sure it arrived ok through the post office, and it is in perfect condition.
I'm not allowed to "sell" things on this thread, but will accept genuine offers (no low ball offers as this is a rare and expensive item) via PM.
Also will consider trades. (Amps, Subwoofers, Acoustic Treatments, etc - full or partial trade)
Pickup in Southern, OH is fine or will ship.