Gem Car Clip in Stake Bed- Wanted to purchase

Looking for a clip in stake back for Gem 4 seater to replace the trunk, I am also going to have the Clip in Trunk available for sale or trade.

I found one no longer in the market!
Btw, these are now 2500$ on the Polaris website! That’s absurd!

Do you know the specific model #? I see one on eBay for $1500 part #2884603 but there are no returns and I do not know if this will fit my 2011 E4. Thanks