Drill Collar

Dear ladies and gentlemen,
i need for a high end german customer from me 150 pieces drill collar , produced in turkey, with very very high quality aspects (end customer is very strict).
the drill collar in 9,m long in diameter 8 1/4" and with id 3".
please send me name of a company, which one can produce this kind of parts.
then i send my rfq to the company.
thanks and best regards