Hi, does anyone know where I could get hold of a bucket brigade chip, or an alternative delay method?

 

You could search Ebay for SAD512 or SAD1024 IC's; sometimes they're available. Pricey, though.
You also might look over here:
http://www.electro-music.com/forum/index.php?f=149
They haven't been made in a number of years now.

 

I should have at least one somewhere, and the application databook too.
If you are serious or cannot find it elsewhere, let me know to externet at inorbit dotcom. and I will find it among my bins. I paid around $42 for each.
Miguel

 

There is an elaborate work around. You would need to digitize the audio stream and store the conversions in memory. After the chosen delay, play it back through a D to A converter. A DSP chip might work for the process.