MSC Industrial Direct Inc., Melville, NY, distributor of MRO supplies to industrial customers throughout the U.S., reported sales of $431 million in third quarter 2007, an increase of 30.7% from the same period a year ago. Sales from the J & L Industrial Supply acquisition accounted for about 74% of the growth.   ; Profit in the third quarter 2007 increased 23.6% to $45.8 million, compared with $37 million in the prior-year period.   ; For the first nine months of fiscal 2007, sales rose 32.8% to $1.24 billion; J & L represented 72% of this growth. Profit for the first nine months was $126.6 million, an increase of 23.7%.   ; MSC reported that the J & L integration was on track. MSC has completed the migration of the distributor to the MSC computer system, and J & L orders are now being shipped from MSC fulfillment centers.   ; MSC's David Sandler reported: Although market conditions have not changed, the two most recent ISM index reports show more optimism in the market. We are not currently seeing that optimism reflected in our ordering rates from customers, however, history shows that if the trend in the ISM continues, we should see improving business conditions in the upcoming months."