We are leading textile product manufacturer and exporter , we would like to send an invitation letter to our customer to visit our stand at Heimtextile-2011 for new business possibility our stand number is 10.0 C-32 .

I would give 3 typical prices for your textile products, and a coupon for 10% off.
I wouldn't write a standard letter; people don't read more than 2 or 3 sentences.