The Mickey Mouse (and Minnie Mouse of course) Pre-Stamped Postal Card / Postcard set of 2 is sold out at the counters. It is also sold out on eziemall.
The final option is for SODA members to order via SODA order forms:
Ooops, just got news SODA is finished too.
Updated 15 November 2018:
A surprising information, when I asked Philatelic Bureau today, the counter is accepting the SODA order forms including the Pre-Stamped Postal Card set! I guess it is who you ask. Anyway, no harm in sending the order if you missed out.
Shah Alam General Post Office still have the Pre-Stamped Postal Card set. Go quick or the dealers will grab the stocks! Many thanks to Jacqueline (myfdc reader) for sharing this vital information.