I'm still curious to know what the actual difference is between the front and rear valve blocks - I'm having sagging of the front after my control arm replacement, not sure if it's due to having depressurized the system and some desiccant dust got into the solenoids and are keeping them from closing properly, or if the extended range of motion of the strut sprung a leak. The front valve blocks still show out-of-stock, but the rear is available. I don't have spares to dismantle and compare, but I'm curious to know if you could adapt (perhaps just by changing the connection pins) the rear block to work on the front, or if there are orifice differences or whatnot.
I'm also curious if folks have found a good o-ring kit to rebuild the valve blocks. The last one I got from Amazon was a bunch of o-rings, that might have fit, but did not look to be a match for what was on there.