After several unsuccessful attempts to get a Moonsound, first from eBay and later from Sunrise he finally considered the possibility to acquire a clone such as Ricardo Oazem's Shockwave or Saebaryo's Dal So Ri but was unable to get one due to different reasons.
Shortly after, Gustavo noticed that he had the main components on an old sound PC board. So why not make your own OPL4 compatible cartridge? Said and done, with the help of the user Pablo Roldán (aka The Woz), from whom the board receives its name, the aforementioned Retrocomputación forum and datasheets, the first prototype was finished. Later a second version was made in order to get a cheaper board. You can see and hear the Wozblaster in action here.
Thanks to Gustavo who provides all the documentation of the project (in Spanish), you will also be able to make your own Moonsound! You can find more information about the the beginning of this challenge and at the Wozblaster blog.
What it makes this more interesting, is that Gustavo studied film and doesn't know a lot about electronics. That means anybody can create a Wozblaster themselves, so what are you waiting for?