You could try http://www.remotecentral.com/, or perhaps even www.remotecodelist.com/remotes. These two websites recognize that there are so many remotes available these days that it can often be hard to get the right codes, and so they provide you with assistance and codes that can making using the devices a breeze.
If for some reason you cannot find the codes you are looking for, however, there are a couple of things that you could do.
First of all, you could try forums. There are so many forums out there you wouldn't believe it, and they're all related to individual things. Some forums might cover a broad basis of things but you will easily be able to find a forum that discusses codes for universal remotes. There is meant to be a community and discussion board on www.remotecentral.com, so perhaps look there.
Once you've found a forum that you believe could be able to help you then you simply need to register. Many forums will require you to make a certain amount of posts before you can create your own thread, so you will need to get involved with some discussions before you can create your own. Then when you've met the requirements you will be able to put up your own discussion thread. Simply ask the question you are asking here and all the people that have either had experience in this or know something that doesn't appear to be widely available on the Internet will post and help you. The whole point of a forum is to talk and help one another, so as long as you get involved then people will be more than happy to help you.
Failing that you could get in touch with the manufacturer to see what they could suggest to help you. Just get in touch by whatever means they outline on their website.
If for some reason you cannot find the codes you are looking for, however, there are a couple of things that you could do.
First of all, you could try forums. There are so many forums out there you wouldn't believe it, and they're all related to individual things. Some forums might cover a broad basis of things but you will easily be able to find a forum that discusses codes for universal remotes. There is meant to be a community and discussion board on www.remotecentral.com, so perhaps look there.
Once you've found a forum that you believe could be able to help you then you simply need to register. Many forums will require you to make a certain amount of posts before you can create your own thread, so you will need to get involved with some discussions before you can create your own. Then when you've met the requirements you will be able to put up your own discussion thread. Simply ask the question you are asking here and all the people that have either had experience in this or know something that doesn't appear to be widely available on the Internet will post and help you. The whole point of a forum is to talk and help one another, so as long as you get involved then people will be more than happy to help you.
Failing that you could get in touch with the manufacturer to see what they could suggest to help you. Just get in touch by whatever means they outline on their website.