Sorry mate if no one has replied but the gun is another rare one so parts are rocking horse S%^T. Most of the time for spares we look at buying a messed up complete (ish) model and taking the parts we need off it, most members of this forum end up making spare bits themselves. You could PM shazib on this forum a member in Japan who may be able to keep an eye open for you but no guarantees there i am afraid of finding any, thats the trouble with this hobby a lot of models were made in the 60's 70's and spares have practically dried up, sorry thats no help but thats the situation.