Good day. We were in the same boat last year, chasing brokers who overpromised. The supplier that worked out for us is Taurus Electronics, they focus on hard to find ICs and source directly from factories and from their own warehouse rather than flipping random lots. Since reliability is your priority, you will appreciate that every part goes through full functional testing, X-ray inspection and originality checks before it leaves them. They also offer flexible terms on delivery and payment, including bank transfer, which made our procurement people happy. I would send them your part list and let them quote.