3d printing may be your friend here. i have 3d printed a couple of strange tools to tighten various BBs. From memory, I think i need to print the tool to install a Moqai T47 BB, for example.
Thingiverse is likely to have the tool you need, then you simply have to print it. if you dont have a printer, make a friend, or find locally. it's become so common, it can't be expensive to have it printed. it costs me pennies to print such tools. Basic PLA is sufficient if you know what you're doing.
It's amazing that the shop selling these is incompetent to the point of not knowing what's needed for installation. Very hard to respect that level of incompetence.
