I've got a custom made (by CPR) super-sized BakPak that I could part with. It's not the one that is the double-barreled one, this is a custom creation that was made for a a reefer in California. If I understand correctly, it's got the skimmer chamber of a DX6 and a corresponding sized body. It's powered by a Rio 1100 (I think), which I bought brand new when I bought it.
Since I've taken my 90 down, I have no use for it. I'm going back to smaller tanks, so it's just taking up space in my basement. Make me an offer I can't refuse.
Might have more stuff to offload in the near future. Time will tell. I'm going to go through all of my boxes and see what turns up.