I am looking for the various trade and commerce systems for traveller,  mostly for the 6d versions, so I have the mongoose 1^st ed, LBB book 2, Merchant prince, Marc Miller’s traveller, Mega traveller, 101 Cargos, so what else am I missing? And where will I find it?

I also have Gurps, T20, TNE but since these are not for d6 games I am not looking at them to start with.

I suspect that mostly what I am missing is variants from fanzines or magazines, any one want to help?

thanks

Nick