可以帮我翻译一篇外贸函电的信函吗？

Dear Sir Thank you for your mail last Friday. I really appreciate your intrest showed in our audio books. As you required, I have attached the specific catalogue of books on tape, which is newly printed. It is well-known that this industry has been advancing rapidly, so we will keep you being informed about new books as soon as they are offered. Another point mentioned in you mail is about equipment for playing audio books which is out of stock. We promise you that it will be sent out next week after we stocked. If you have any more question, please feel free to write us. Yours faithfully, *** 不好意思，好久没碰英语了，写的不好，请见谅。希望能对你有所启发！