There’s CX-specific Vs, TRP CX9 for recent shimano road levers or CX8.4 for older ones (and I think also for Campy and SRAM)
I have 5600 105s, but didn’t want to pay £80 for my brakes, so I got some of the Tektro BMX equivalents (TRP are posh Tektro). I think it’s 926ALs I ended up using but there’s a few options. No need for a Problem Solver or similiar with these- the lever throw’s quite long though. I did have to add noodle cable adjusters though as neither levers nor caliper has them. You could possibly find a decent setup without but the way I like them means it’s neccessary to spin out the adjuster a little to remove the wheel.
2 nice things- one is that they’re cheap obviously, £12 an end. But also, they’re not choosy about pads, so no extra expense there either.