Recommend a good RV Cover for 28-29' TT?

I have most always had ADCO. Never got more than 5-6 good years out of any of them though, usually the UV turns them to dust. Looks like this year it may go uncovered. I need a new one and refuse to pay the inflated prices they want for covers. The Adco's I previously bought with the Tyvek top were in the neighborrhood of $300. Now the comparable cover, since they quit making the Tyvek topped one is closer to $600. Its called the UV hydro. They're also not available. Must be on a slow boat from China.