Unusual fix on a big porch shade

So this client has a porch and I put in a 10 ft by 10ft shade, he uses it mostly to keep snow off the porch in winter.
Trouble is, when the wind whips up, the shade jumps around and gets folded funny and what not, SO . . .   I came up with a plan to install bungee cords to keep it in place.  Seems so simple but try finding bungee cords when everyone on the planet is tying down everything in storms and the container ships are backed up.  so I screwed in 2 long PVC boards at bottom (had to eyeball everything as nothing was level or symmetrical on this old house)  and put hooks at the top (again, nothing in stock anywhere) and I found just the right length of bungee (well, 2 paired together) to allow the shade to roam a little and move freely up and down.
Works great, and looks terribly elegant.  now we wait for a hurricane.  :-/