It will be about the same price to convert it to a softener vavle as it would be to buy a new valve if you upgrade the electronics at the same time. Is your valve an SE or SXT? When you plug it in, Blue is SXT.
here ya go.
61454-0 or 00 depending on tank size, either will work fine if your tank is 9-10 diameter
61455-00 if your system has a 61456-..
You will also need the 3/8" jaco nut and install kit for the brine line, a brine tank assembly, water softeing resin, and a DLFC button to match your tank size. 2.0 for a 9" tank, 2.4 for a 10" tank, 3.5 for a 12" tank assuming normal water temperatures.
I have several dealers who will sell you the parts, these are all normal stock items, it is a fairly easy valve to retrofit.
Depending on the age of your system, you may also want to upgrade it to an SXT version if it is the older SE, this woud also require that the cover be replaced.
If your funds are adequate, I would highly recommend installing the carbon unit, a installing a 7000 softener after it.