Re: Natural wood finish lightweight locking trem Ibanez models?
... the 540S has a natural oil finish one and a stained oil finish one; some have maple fretboards, others have rosewood.
Yes, the early 90s 540S in OL (oiled finish), or also called NOL (natural oil finish), comes to mind. Here's an old Reverb listing for a 1993 one:
Of course, they had Wizard necks which will feel very different than your PRS, but I like 'em!