Any riser that will work on Std/Tourer will also work with IS (even with the fairing and bigger tank).
An inch up and back isn't that much.
A good buy in Valk risers are the in-house HDL risers below. OE riser height is around 3 1/8", most of the garden variety aftermarkets are 4", these are 4 1/4". As they sit on an angled triple tree, up always means back too.
http://www.hondadirectlineofshadyside.com/stores/product.asp?pid=468&str=2&ID=553502586More guys probably use these than any other; little more movement, over twice the price (and the bling factor is mostly hidden with the IS fairing). I have them and they are a great improvement.
http://www.hondadirectlineofshadyside.com/stores/product.asp?pid=519&str=2&ID=553502586