Apart from these valves not being listed on EPC under VIN numbers, there is also added confusion as to part numbers ordered v what arrives.
K2 worked out okay as detailed previously.
Stretch, going to refit K2 but also remove B1 and check part number, there's always a remote chance the remaining (light blue) valve may fit but doubt it.
If it doesn't, refit reassemble checking modulator operation too, refill with around 3.5 liters of new ATF and hope this cures 2-3 and 3-4 hard-ish flare. If so, this bodes well for replacing B1 along with full flush and new filter.
Cheers,