Slater's Printed PO Wagons

I notice from the Slater's Site that several of the pre-printed PO wagons are 'currently unavailable' including the iconic Manvers Main.

Aaagh! Could it be back to hand lettering PO wagons? Ah well at least the Round Green wagon is still available and it's ideal for the GCR up to around World War I. Better buy some while they're to be had...