I really think your best bit for Windows NT is to stop looking for a product and drive the question what is it that NT is required for? The O/S has not been supported for a decade.
Whilst you will have Windows 2000 support for some time, a similar discussion should begin about that platform as it will be the next one to be expelled from any support.
Granted there may be some apps not written for currently supported O/S's but how long is long enough.