[ic] [bounce] question

[DB]

I want to use the tag [bounce href if] on a flypage to redirect visitors
to an external URL if the sku matches a pattern - say the first 3
characters of the sku are ABC

In other words, if someone visits the flypage:
http://www.domain1.com/ABC-123.html

I want them to end up at
http://www.domain2.com/ABC-123.html

But for all other skus the flypage should work as normal. I'm having
trouble cooking up the correct 'if' condition. Does anyone have a
suggestion?

Thanks

DB