I certainly don't, but it shouldn't be too hard to create one. But, before I started ... what style of music? Maybe you can tell me the song you want to play (bet it's a Brubeck)
Also, depending on the style, don't forget that you can combine existing grooves on alternate bars. For example:
Groove Swing Jazzwaltz
would give a bar of 4/4 swing followed by a bar for 3/4, and then loop. In most cases this sounds crappy, but you never know