The question I have is do you want a classic shape, or do you want a carved pipe (i.e. figural, animal, etc.)?
If you want a nicely carved pipe, then I would recommend these carvers:
Tekin Uzkesici
Ismail Baglan
Huseyin Cor
H. Yavuz
Sadik Yanik
Fikri Baki
Ismat Bekler (CAO)
You can find some great classic shapes as well as nicely carved meers from these brands/vendors:
IMP
Altinok
Altinay
SMS
Meerschaum Market
I've had good success with Meerschaum Market. I have 3 pipes from them and they're all great smokers. Meerschaum Market sells IMP pipes, as well as pipes from some of the carvers listed above and many other great carvers.
You can find some great meerschaum pipes on Ebay, new and estate. One of the best meerschaum makers prior to 1970 was Andreas Bauer from Vienna, Austria. You can find some really nice Andreas Bauer pipes if you're do a little looking and have some patients.
Good luck with your search and future purchase.