Hello,
Are there any colours in particular and in which range? We very rarely run out of stock completely of something, although it does happen occasionally as we are extremely busy and sell a lot of hair per day.
We also don't list all of our stock online due to selling over the phone, walk ins from our retail locations and stock kept for our stockists. If it ever says out of stock, I would just give us a call on the above number and someone will check the stock levels for you.