[sdiy] wave/surf machine

[synth at oldmail.charlielamm.com]

I have been commissioned to build a surf synthesizer (sound of waves at a 
beach) for an "artist party" that's coming up end of december.

Here are some of the specs:

a) Can't be a looped CD or a sample if possible.  Analog sounds (pink
noise, random S/H, EG, filters) should be used.

b) doesn't necessarily need a built in amp; a PA system will be provided

c) Should be relatively hands-off; no complex control surface; if 
possible some control of "big waves" vs "small waves" would be good, maybe 
via a single pot, but this isn't critical, and an attenuator for the 
output would be a plus.

d) Must be self-contained; no external noise generators or whatever
needed.  Mono would do but stereo is better, so, basically 2 outputs: out
R and out L.

d.5) -10dbV-ish sort of output levels--consumer type.

e) Needs to be reasonably realistic sounding.

f) Must be built by about Dec 1, so nothing too complex.

g) Should not cost a fortune to build.  I could throw maybe $50 for parts 
and PCB's, but not a heck of a lot more--I do have a large junk box 
however.

h) Powered by a wall wart or 117V; no need for battery power.

i) Needs to sound good and reasonably realistic--these are artists after 
all!!!

Any suggestions?  PAIA once sold a kit for one of these, 
but I think it's long gone--they still sell a "surf man" PCB, and 
something like $15 for the documentation, but I have no idea if it's any 
good or if it fits the above specs, or if they even have it in stock.

Google searches reveal nada...maybe I'm not searching for the right thing?

Any suggestions, about the Surfman or anything else, are greatly 
appreciated.

--CL