AF1 Racing's web shop is my first stop to see what's available for specific models, even if I usually end up buying out of Europe because their exchange isn't friendly. One thing I like about them is they will list parts that work with a model, even if they're not listed as fitting, and may link to instructions if modification is required.
Assuming Aprilia + heavy =
Caponord, it looks like R&G makes some frame sliders that work, as well as some case covers. Still won't be cheap by the time you add it all up, depending on how many pieces you want. Here's a link to the AF1 list:
AF1 Racing. Caponord 1200 Crash Protection