Missing passphrase word for counterparty.io wallet

I apparently only wrote down only 11 words of 12 yet I logged in earlier this year - so that is odd.
Its possibile there is another record of the passphrase but I am not near its location now.
I do have the private Key and am wondering if there is another site I can utilize it to import?
Help is much appreciated,
Philip

if you have the private key (only links to one address) then you can import it into freewallet.io desktop wallet or any other bitcoin compatible wallet (like electrum)

Years ago I actually made a tool for just this. If you have the address + 11 words, my script CounterTools finds the correct passphrase. You can find in Jpja’s github. Download, unzip and run in your browser locally.