Need Cisco IOS for emulation

I am doing some lab exercise in GNS3. Therefore I need IOS for the 2800 series routers and 2960/3560 switches. I also need the IOS for Cisco 1921-SEC/K9 Router. Does anyone know where to get those? I tried to register on Cisco's website and download the IOS for the 2800 series router, but got an error messages that goes like this:
"Service Contract Required: To Download this software, you must have a valid service contract associated to your profile."
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NetExpert Network Solutions Pte LtdTechnical SpecialistCommented:
To download the IOS from Cisco website ,either you need to have a CISCO contract (bought CISCO device from Cisco with support) or your working company should be a partner with Cisco.

Without that you can't download the IOS from Cisco page

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itniflAuthor Commented:
No alternate download locations?
NetExpert Network Solutions Pte LtdTechnical SpecialistCommented:

You can try from torrent website.. But I am not sure about it too..
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First, not all Cisco images work great with GNS3, so you should find images that work.
Second, you can see on Cisco site full IOS image names and paste it to google, and you will find that Cisco IOS images can be found on many FTP servers that are not password protected (thank you google  for that :) - I don't have c7200 device anywhere, but I read that image below works great in GNS3)
Link on subject
itniflAuthor Commented:
There are a lot of false download options on Google. Takes time to go through them all. Here is one that works for the 2800 and 2900 series router:
No need to go through them all, just until you find what you need.
And again - many images are not stable in GNS3. So, some errors that you can experience could be from emulator and you can loose hours solving problem that is caused by bad emulation (at least, I know I did).
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