HTTP-Binding / BOSH with XIFF2 classes?

Does anyone have a solution to use connections via HTTP-binding / BOSH with the XIFF2 classes? I’m searching for something like the XMPPBOSHConnection (see XIFF3 classes) for XIFF2. Due to firewall issues I need this functionality in a XIFF2 based chat application.

I’m aware that the XIFF3 (beta) classes contain a solution. But for various reasons we are bound to Actionscript 2, so we unfortunately cannot use XIFF3 offhand.

Thanks in advance for your reply!