Mine also installed with SPD (installed 2015-09-19). Ever since, Only one time there is quite heavy lightning strike as reported by my wife but RCCB didn't trip.

For electrician phone you can get from local shop which supply electrical part for contractor, not shop which selling electrical appliances. They do leave the business card number.

For SPD & auto RCCB I bought from L.V Control Technologies SB. 03-80112999. Mr. Alan Chua (alan@lvcontrol.com.my)

L.V.CONTROL TECHNOLOGIES SDN.BHD
No.3, Twin Park
Jalan Subang 7/1
Taman Perindustrian Subang USJ 1
47600 Subang Jaya

The function of a surge protection device is to prevent a sudden Surge of Voltage from damaging your electronics by providing a path of least resistance to ground.. a protection against lightning strikes to overhead electrical lines and or from bad earth rods (which picks from impact  zones and carries the voltage surges to your box) .

Only if this is the case then you can install it anywhere from your kwh meter cables to your distribution box.. A common practice is to install inside the DB but its not the only way to have it installed..

You can have it installed in its own enclosure after the kwh meter at any point before the DB (thus the equipment to be protected)... connect all phase/neutral cables to the SPD and connect SPD to a known good ground. (Ground rod reading below One Ohm)..