怎样要求日本公司发英文商务邀请函范文

怎样要求日本公司发英文商务邀请函范文
想日本公司发商务邀请函,英文应该怎么要求呢?
I have looked at you give me information,I and my partner on your company's products have some initial interest,we have intend to your company to visit and discuss cooperation issues,but my partner Chinese residents need to have your business letter of invitation to apply for a visa.If you are willing to receive us,would you please on my partner commerce issued an invitation.We will run immediately after a visa to meet with you.I believe next month on it.If you agree,then I'll give you his information.Please tell me your Fax number,hope We can be properly co-operation.Thank you for your support.

Dear Mr/Mrs xxx
Sorry for the late reply,I have looked at the information given by your company.my partner and i are interested in your products and we may plan to head down to your company for further discussion.However,we have encounted a problem,my partner needs your company's invitation letter in order to apply for his Visa.I will really appreciate it if your company takes the trouble to send an invitation letter to us.upon receiving his verification for Visa,we will defintely head down to your company in no time.the estimated time should take around a month.If that is not of a problem mentioned,i will be really looking forward to our cooperation in the future.
your help will be greatly appreciated.Thank you.
你的名字
P.s:please do inform me about your Fax number in order for me to provide his particulars.