All the container stuff is totally irrelevant and useless from flashing standpoint.
Whether it is done with some fancy useless stuff or you take an unpacked bin file and patch the TPROT yourself makes no difference from a protocol perspective whatsoever.
The important part is the protocol. Either they have RSA workaround protocol for K-line or they don't. After you get the RSA workaround write in with your TPROT offed original file then of course you can write cal area.
You can write cal area on all MEDC17, nothing special here.
I think you don't understand much about how this works
So far I've not seen any tool have RSA bypass via KWP2000, but maybe MPPS has it. It's just about crashing the bootloader after all, probably quite similar to TP2.0