Please please PLEASE can we have a cajon?

I have been trying to write a piece featuring a cajon, and, after finding out that Musescore does not have an option for it, changed the name of a 'percussion' staff with the right amount of lines.

However, when I came to choosing the sounds in 'edit drumset' I discovered that there really were few suitable sounds for the wide range of techniques on the cajon.

Then I tried looking online for a free cajon soundfont (I think that was the right word but I couldn't find much info on it) - and nobody did one.

Therefore the only thing left is for me to request for the addition of cajon to Musescore's instruments, or for somebody to point me in the right direction regarding free (and safe) internet downloads or modifying a percussion staff.

(Also having created an account just to ask this one question, the long list of forums pretty much all of which had names I didn't fully understand isn't a great website feature!)