Looking for replacement parts for Lowarance Mounting Plate on >2014 Hobie's

A friend of mine just bought a 2014 Hobie Outback, and then bought a Lowarance 4 Chirp unit and found that he cant properly mount the transducer because there are missing parts to mount the transducer into the slot that positions it with the Lowarance Plate on the bottom of his yak.  I'm not sure what to call them, but found a video on installing one and took a screen shot.  Anyone know what you would call them, or anyone have a spare set they would be willing to part with? 

Those parts will/would come from Hobie.  I'm sure they have a P/N for the replacement parts kit but I don;t have that P/N.  I would "guess" that this could be fairly quickly rigged up at HD, Lowes or OSH using a bolt, a few stainless washers and a couple rubber gaskets to provide the friction between the vertical uprights & the knurled surface of the transducer arm.

I was clicking on that image trying to play the video.

Just check in the March 2016 Hobie parts and accessories catalog for your missing parts.  No nuts and bolts, just installation kits.  I'd try a hardware store.

I am guessing these are the parts..  I did a search on the Hobie Catalog for Lowrance.

86505601 LOWRANCE READY COVER PLATE
86505611 THRU HULL PLUG
86505621 HOBIE THRU HULL WIRING KIT
86505701 RUBBER ADAPTER PLUGS (TREE)
86506001 LOWRANCE ADAPTER
86506101 LOWRANCE STAR MOUNT ADAPTER
86506201 TRANSDUCER SUPPORT CLIP

http://cdn.hobiecat.com/digital_assets/87367021-2014-summer-international-kayaking-parts-catalog.pdf

Maybe if you buy the Lowrance Cover Plate its included, not sure..