Just use any brand with JKR spec cables. Those SIRIM non-JKR spec cables are mostly undersized (e.g. 4mm²>12AWG, 2.5mm²>14AWG, 1.5mm²>16AWG), whether this apply to all non-JKR SIRIM cables I don't
know. Whether they use the correct sized cables during certification but selling undersized who knows, nobody seems to care enough. The cost per actual mm² between JKR spec vs non-JKR spec is basically same.