The 2SC4029 “NPN” & 2SC1553 “PNP” are not currently in our system. Here are two possible complementary options, Toshiba Semiconductor and Storage #'s 2SC5200N(S1,E,S) “NPN” and and 2SA1943N(S1,E,S) “PNP” to review. Please make sure to review the specs to reassure these will work in the application.
Please review the datasheets to ensure the alternative will work for your application.