Where can I buy this much elusive engine oil (Delo 400 multigrade engine oil)?

I have been to numerous Caltex stations, the highest rated they have is Delo Gold which is API CH-4, while Delo 400 is one notch higher at API CI-4

I would have preferred to use sythetic oils, but im a bit hesitant to fill-up just for break-in period, also i hate to waste synthetic oild, too expensive at ore than twice the price..

Thanks in Advance!