OK. At the risk of showing my wise-ass colors yet again : your sending it to "Savinelli" for a replacement means, in practice, you'll be sending it to their designated repair guy here and they'll be taking a cut of what they're paying him.
What he'll do is put a stock casting in the lathe, turn the tenon to fit, shape & bend it, stain/wax the sanded-over shank end, and there's your new stem.
If you liked the stem that was on it, you'll like the new one. But you'll have put $45 + postage both ways into putting one of what Marty P famously calls "hundred dollar pipes with a twenty-five cent stems" back on the road -- stock.
How long a wait sending it to LL would involve, I don't know, but he'd do you a state-of-the-art, inside and out job from near scratch of much higher quality lucite for around $80 and the difference in the way it smokes & tastes would be possibly astonishing. Or the same job your factory-authorised guy would do for equally cheap, but probably to a higher standard. (Then again, it might be a wash).
Or you could send it to Mark Tinsky who would modify (outside & inside as needed) a good cast stem for a lot less, do a beautiful job of it, and have it back in the mail to you the day after he received it. And for, if the last one he did for me was typical, enough less to notice.
It maybe sounds Clintonian, but it really does depend on what you mean by "stem." Apples, oranges and bannanas are all "fruit" the way the above are all "stems."
Trying to be helpful here.
:face: