I hope to visit your company, but before that I'd like for you to send me your latest catalog where I've seen many of your products from the Saudi Arabia market that are not shown on your website.

correction: I hope to visit your company, but before that I'd like you to send me your latest catalog where I've seen many of your products in Saudi Arabia market that was not shown on your website? For more option: I hope to visit your company, but before that can you send me your latest catalog where I've seen many of your products in Saudi Arabia market that was not shown on your website?

It would be better to ask it this way: "Does* this sentence have* good grammar or not? If not,* what is* the best way to say that?" If I understand you correctly, I think this is what you are trying to say.... "I would like* to visit your company,* but before that **I would appreciate if you could please** send me your latest catalog.* I have seen many of your products in the* Suadi Arabian* market that are* not shown on your website."