[XeTeX] How to get _third_ stylistic alternate?

[Grzegorz Murzynowski]

Hello,
currently I'm using XeTeX v. 3.1415926-2.2-0.997 snapshot 639.
(and it works great!!! :-)

the +salt or fontspec's Style=Alternate feature gives me the first of 
_three_ stylistic alternates of Garamond Premier Pro's & (ampersand).

Is it possible to get the _third_ one? The +ss03 or fontspec's Variant=3 
features have no effect.

Fontforge says about this glyph:

1297
(0x0511)
U+????
ampersand.alt3
U+0026 AMPERSAND


I guess "1297" and 0x0511 is the glyph's number in font—can I access it 
anyhow (of course \char"0511 doesn't do that neither ^^^^0511)?

Grzegorz Murzynowski.