I don't know where you got that USD 300 Mio figure as base model cost. As far as I know the base model cost is USD 220 Mio..and the overall package USD 300 Mio++ including Exocet SSM, Mica VL, Sylver VLS (either A35 or A43), and Rheinmettal Oerlikon Millenium CIWS.
The initial contract of USD 220 Mio is only for base model and 76mm Oto Melara gun, and sensors. Additional seperated contract will be for those other weapon system, which is why the hand over is not with those weapons systems asside the 76mm gun. Still is not something new, the Indonesian procurement has many contracts where weapons will be procured on next seperate contracts when budget already provided. Indonesian procurement used to get platform with minimal weapons first, then other contracts followed for the rest weapons-system packages.
As for the new LPD, off course it's followed Balikpapan class configuration, however looking the specs especially troops carrying capacity, I do believe it's more following Philipines SSV, that being builded by PAL. There are a lot off weapons system that being taken from decomissioning ships,and 40mm bofors are quite abundance...so it's no surprises many of it will come down to secondary layer ships like the LPD or the LST. Afterall with budget procurement is more on platform oriented first, then you can be sure they will recycle as much as weapon system that still possible..
Speaking of LST, it's confirmed that TNI-AL will get 7 of Bintuni LST as replacement of old ex WW2 US made LST that already decom.
Indonesia to receive three new 120 m LSTs by 2018 | IHS Jane's 360
Privately Owned DRU shipyard previously got contract for 2 LST while State Owned Kodja Bahari shipyard got the other 2 LST contract. Thus made 4 LST Bintuni class. Seems DRU shown more reliable delivery, thus the next batch contract of 3 LST being given all to DRU Shipyard.
Those Bintuni class LST will complement 6 South Korean made Tacoma class LST, and 12 ex East German Frosch. Frm what I heard, only 8-10 Frosch and 5 Tacoma LST that still operational. Thus some speculation come out that more Banjarmasin type LPD or Bintuni class LST will be further build, to take over Frosch capacity, since it's projected those ex East German LST won't last much longger, which then will be follow by those South Korean build LST. All of those build in the 80's even mid 70's for some East German Frosch. Thus I believe more Banjarmasin LPD and Bintuni LST type derivatives will come out in the future, if TNI-AL want to keep maintain it's quite substantial Amphibious capacities.
