Ivacgar tank you for reply,yes my one is unfinished,i was thinking maybe on the 114 series the 6mm verison as you said might fit?.if i could have it as a filtered pipe it would be so much better for myself
If the Pipe is of sentimental value but you need to change the stem.I would suggest you buy another grezza 114ks from ebay with a 9mm stem and swap the stem over they are interchangeable.
I bought mine on ebay from MARINI (based in Italy) for £34 plus postage.
At the check out you have the option of choosing the stem either as 3mm or 9mm or no filter.
It would be difficult to have a stem made plus postage for the price of a new Grezza pipe.
I have four 9mm Grezza pipes from Marini and they are all excellent pipes and great smokers.I did try to buy an extra stem from them once and they said no.