I have an old sailboat cradle here in New London it is made up of heavy angle iron ( 3x3x1/4 ), u-channel ( 1.5x6" or 8" x 8') and pipe ( 3"x 3 or 4')
all the sizes are guesses as I do not want to go out in the snow and measure it.
The cradle is bolted together but has been sitting for a few years and is a little rusty, it should un-bolt or cut it up with a sawsall.
You must take it all, bring a pickup, a lot of free steel, the u-channels would make good bumpers.
Will C