They seem to be pretty generic really, especially the cheaper ones. It's just a metal box with a spring running between 2 RCA jacks... I literally bought the cheapest one I could find on eBay. To be honest, I can't tell any difference in how it sounds from the original one. Take one out of another amp and see if it works!
Well it's been bloody ages since I posted anything on HC.... My trusty old Laney TF320 has decided - 2 weeks before I go on tour - that the reverb no longer works. Brilliant! I've had a look at it, all the connections seem to be in order. The signal seems to be going through the reverb tank but I'm not getting any reverb from it. I even tried replacing the cable connecting it to the amphead but no joy. I've seen reverb tanks going cheap on ebay, can I replace mine with any old unit?