You will have a better selection if you choose 215/70/15, but if the sticker on the door says 215/65/15 that means the speedometer (VSS) was calibrated for that size. Does your PA have Grand Touring Suspension (GTS)?
Most base PA's come with 205/70/15 but the GTS option came with 215/65/15. You might have a hard time finding WW tires of this size because they are typically used on a touring sedan. BTW, the standard outside diameter of a 215/65/15 is 26.0" & 8.8" wide; whereas a 215/70/15 is 26.7" & 8.8" wide. Very little difference and certainly not enough to pay a premium price for!