PA12 Hummingbird Sounder adapter?

The PA12 may be "Lowrance ready" but to be Hummingbird ready it needs an adapter.  I've skimmed the usual online retailers and haven't found it.  Anyone have a lead on where to find one online?  I'd rather not have to resort to ordering from my local shop as the last part I needed didn't show for close to a month and I'd like to get on the water considerably sooner than that. I guess worst case I'll fab the part myself.

I guess I don't exactly understand what is being adapted to what.

Are you trying to use a Humminbird head unit, with a Lowrance 'ducer? 
If so, has this ever been done?

If so, do you have a link/image of the part you are looking for? 

In the video you can see Morgan installing a Lowrance transducer onto the transducer well bracket.  A Hummingbird transducer is shaped differently and needs a adapter to be installed in the same way. 

Problem solved for less than four bucks and one trip to Wilco.