When our large standard poodles rode
in dinghy, they wanted to park there butts on the tubes. We felt that looked a bit precarious at times during rougher conditions. In rainy weather
they went under the bow skirt.
I suggest an easy fix for you, simply cut down a plastic milk crate or two or more, tie strap them together. You can get more depth
like one or two inches instead of 1/2 or 9/16 which doesnít seem like enough for the ideal situation.
I used milk crates for lp cyls on deck
( no rust)( if your tanks
are coated ) .
Also in dinghy they are great for storage
as see thru boxes that stay dry , for pfds, pumps , lines. Put a throwcushion on open top and you have a comfortable portable seat.
Another possibility is to scrounge up recycled plastic wood from somebodyís deck project
I did and rebedded dog / human loading platform on transom. Cuts like wood , sands , likes ss or brass screws , and will work