Hi FD -
If you have the 'Original Install discs' that come-standard with all Pango LD2K suites, there should-be an 'extra disc' (DVD, iirc..) called 'Lightspeed Design - additional Frames / Animations', or something like that, and that 'collection' has quite a few animations, very-close to what you are looking for.. One (iirc..) called 'bubbles', that is just like that - 'rising' spheres, nicely-colored, etc.. Alternatively, you could contact Aaron @ pangolin.com, and, upon providing your serial#, they could perhaps upload-some frames for you, or, kick you out a replacement CD / DVD, etc..
..but, if, ie: 'your dog ate your DAC', or some other-such mayhem, you could possibly contact PL-member 'swamidog' about
(..possibly, I can't really speak for him.. 
buying some frames of some *incredibly-cool* 3D, bubble-like fx, he came up with, recently, with 'LSX' (Laser Show Xpress) - awesome package, but.. if you've not the 'time to learn it', etc, he (may..) be in a position to sell you a few frames, and get you off to the races for your gig..
fwiw..

j