Dear Sophisticutsz / Donna
Im a little sad today as I usually get a warmer welcome as a new member to a forum. 
My comment was intended as a SINCERE comment to assist Jevair (as with other posts) NOT to merely promote my website as you have suggested.
My previous experience in R&D and marketing for a global producer and supplier of hair (to many large brands) has revealed EXACTLY how hair extensions are produced. Many of the finishes on coloured human hair make it very difficult to get a good result when dyeing and the hair is further compromised in the process. It was for that reason that I suggested Virgin Remy which has not been tampered with in any way as the only hair category/quality
I would use for bespoke dyeing (regardless of what brand Jevair intends to use). Ultimately, it really depend on the desired longevity of the ext and investment that the client wished. Obviously, you too are entitled to your opinion based on
your experience.
Have a great day!
Alexis