One part of my business involves having industrial components repaired. I've been using a supplier for the 10 years who is quite simply excellent. Great success rates for the most complex repairs. Extremely responsive - emails answered within 20 minutes. Phone calls always answered. I really appreciate this quality level of service. However lately, he has been upping his prices by around 25% sometimes 35%. What are my options here? Do I be that awkward customer here that every supplier hates by questioning every job OR do I just raise my own prices?