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In Bermuda!
You can buy perpetual calendar anywhere by using online shopping. there are many online shops available.
I can recommend you two sites for the calendar maker which you need to download in your computer. One is Photo Calendar Maker and Magic Calendar Maker.
try eBay
www.http://WilliamLevyWorld.com
it will just be there when you buy the computer
You can not buy a particular colour. You will have to dig the wrong colour up, and plant again. Eventually, you will get the colour you need.
I just bought a Bermuda Lucky Stone from E.R. Aubrey. The store has two locations in Hamilton, Bermuda and both stores sell the lucky stones. You might be able to order them online but I doubt it.
Depending on where you buy it. An erasable wall calendar can cost between $20 to $40. Depending on the size you buy & of course quality.
You can buy beautiful personalized Maya Calendar daysign jewelry at http://www.artspaquinmayaworks.bc.ca/jewelry.htm There is also an extensively researched book on the Mayan Calendar that will help you understand the workings of the calendar and the meanings of the daysigns at http://www.whitepuppress.ca/book.html
There are many places you can find a calendar template, for free. One source for free calendar templates is calendarlabs.com. Sometimes, your computer's calendar application will also print out blank templates for you too.
Buy a calendar