As mvut has said, you should ask Digi sales but realistically you should consider externalising this to a router and adaptor.
I have previously used the IX10 and IX14 connected to a serial XBee adaptor or XBee serial break out board for both SX and 900HP modules. Whilst it does make it two devices, it allows you to bring more flexibility in your router of choice as all you need to do is add the github libraries to python https://github.com/digidotcom/xbee-python and you can then do whatever you need.
I personally needed to do this for a client as Digi End of Lifed the Australian X4 variant with no public notification to me or my client using it as we were "end users" at the time.
Just bear in mind that there is an, albeit small, risk that Digi may end of life any product they like with out notice to end users.