OT: How to setup an ebook download for $1.00 donation

[Josef Lowder]

.
After searching the 'net, I've not been able to find a 
simple solution to the subject question, so I hope some 
kind soul will point me in the right direction.

Actually, I would like to find someone who could help me 
create a *simple* and efficient single web page (ideally 
preferrable to having to go through multiple shopping cart
pages) where a website visitor could just click on a "Donate" 
button, enter any amount of $1.00 or more and then securely 
enter the minimum necessary credit card information, and 
immediately receive a pdf ebook download. 

Hope someone can provide some guidance for this.