Thanks for the links. I've also spent an age trying to hunt the solo 35L down but couldn't find any UK stock. How do you find your current 35? I just liked the looks and sizing was ideal for me. I've seen a few places like NDaquatics but as you've found out the costs quickly start to escalate. I've just come across the ADA 45-P tank which is 45x27x30 which is similar dimensions to the Dennerle and is 34L so could be an option if can't source the Dennerle from anywhere but it's also hard to obtain from a few sites and it costs around hundred pounds or so.