Hi,
If you want to make daguerreotypes in the future (for many times), you need to find a good silver plater in your country. For long term it will be cheaper for you, than buy it from other counties. I know it will be difficult, but if you find a good one, you will be happy with it and you can save money. At the beginning you should ask for 15 micron silver on copper and you can reuse it many times. You need to explain to him what you want (after you polished the silver, a mirror like surface, how it have to looks like…..). Don’t let him to polish the silver. You need to do it. You will need to polish the copper as well until it looks like a mirror and then take it to the silver plater. You don’t need any nickel under the silver.
If you want to make dag just a few times and you don’t want to bother with local silver platers you can buy it from Mike Robinson. http://www.centurydarkroom.com/portraits.html
It’s difficult to make electroplating at home. You can find many electroplating formulas which contains no cyanide, but it will take lots of time to research to find the right one and then lots of money to experience with it. Need to read a lot and when you think you find the right one, you always will find a better publication about it
But yes, it’s possible (but not at the very beginning)!
http://daginhun.blogspot.com/
http://www.facebook.com/DagerrotipiaDaguerreotype