Referring shipyards as OEM sounds a bit odd. And also "submitting proposal" sounds odd for a procurement Indonesia will make, it is rather Indonesia has requested a proposal (budget, plan etc) and the supplier has submitted it after negotiations, it doesn't make sense for a proposal to come out of nothing.
If he didn't make any mistakes with the writing i would assume someone has proposed:
either, local-licensed production of some parts (electronics-sensors) and establishing a factory in Indonesia thus they submitted a request, and OEM fits for them.
or, someone is about to buy something from Indonesia, which is less likely based on what he wrote.
If i didn't know his stance against Japanese systems,i would definitely say this would be Soryu or 30FFM, since it is only Japanese has visited a shipyard and probably submarine docks and also offers local production, low interest credit, ToT in considerable amount and the negotiations have been positive so far but again, in this case why would Japan do a direct request instead of inking a bilateral agreement (it suits well if Indonesia has requested the proposal to get the approval from state but again, we know his stance on Japanese systems) ?
He has been ranting about 30FFM and Japanese dominating the market in Indonesia which can make us only think, the Soryu negotations have been positive, thus he has earlier ranted about Japanese domination and lastly told about this procurement.
Lastly, win-win part, a true win for indonesia beyond this point wouldn't be just local production but extensive training of personnel, ToT in design and production of critical parts ability to conduct advanced calculations or acquiring rights of the designs for re-sale like Makassar Class. Win for the seller should't be something for money especially if it is DCNS but rather offering lower prices and making sales through Indonesia in SEA however, this conflicts with previous consideration of license rights.
