My experience has been...when it comes to bag liners for the LT, you have to dish out the dough to get "the best" liners. And that means buying the BMW-brand liners. Fortunately, I bought mine on close-out and got all three of them for under $200!
I've had three other brands and they all fell short of the mark.
As for GoldWing liners...they aren't going to fit right, so why bother? The reason they're so much cheaper is that there's so many more GoldWings out there. A Supply & Demand thang . . . you know.