We have obtained the information on the captioned topic from our correspondent in Indonesia, PT. BUDD PNI INDONESIA as follows:

Following discussions among Indonesia, Malaysia and Singapore, the Indonesian Ministry of Transportation officially launched a pilotage service for the Malacca and Singapore Straits on 10 April 2017.  It appointed PT. Pelindo Marine Service as its official operator of pilotage services for foreign and domestic vessels passing there. 

PT. Pelindo Marine Service can be found at:

http://www.pelindomarine.com/ 

(The contact details are available at this website.)

By the way, please note that pilotage as above is not compulsory but voluntary.