I came across somebody who did a push-pull mod so that you can do individual splits a la 24-08. I have no idea if this is any good but I held onto the link in case I want to do something like that down the line.
The Mad Hatter Solderless Single Volume Single Tone System with 5-Way Selector Switch for Dual Humbucker (SVST-4/25) is specially designed for instruments with two humbucker pickups utilizing a single volume control and a single tone control. The 4/25 has replaced the discontinued IBZM System...
madhatterguitarproducts.com
Dialing back the volume on position 1 and 5 seem to be a good alternative without doing a mod or buying a new guitar, though.