My car shelter is sick

Your lucky the manufacture wont sell to the public *** holes.lol

I believe mine was a King as well. I got it from Sam's Club aka Walmart.
It lasted about 3 years thru some tough winters, high winds too.
It was not like yours, the sides were straight.
When the top started to leak, I bought 2 new tops from Sam's for $90 a piece, and put 1 new top over the old top. It made it stronger. Mine also had the truss kit and larger poles.
I think it was originally $350.
I built a frame for the ground out of four by fours and screwed the pole mounts to it, and tied the sides to it. I also screwed their stakes in the ground.
It held up extremely well, even in high winds. The biggest issue was keeping the wind out of it and from opening the zippered door. I would tie the zippers to stakes in the ground.
Only a few times I had to go inside and use a broom to push heavy snow off.
I still have it, just not set up.
I also ran rope inside and tied the whole thing together, from one end to the other, crisscrossed, and tied the horizontal poles to the ground. The truss kit was a big help.

Good luck, I know what it is like to have no other option but to use one of these shelters,with harsh weather.
Hope this helps.