I used to be an adict to inert ordnance.... I still have a few very nice inert grenades and a few shells... I am still on the lookout for a WW1 german 77mm field gun projectile or good casings... And parts for the Fk96Na! And if anyone ever sees a bolt for a German WW1 TankGewehr, I will buy it for whatever your price is!
I do have a couple of large casings, shells, genades, fuses, etc around... I have a couplete crate of WW2 type 81mm mortar training rounds with extra fins and even some propelling cartridges if anyone needs ammo for their old 81mm mortar!