Fender EC Tremolux clones?

I'm in awe at these new Fender EC amps and would love to aspire to build one at close to their specs one of these days after I sell my BillM modded Blues Jr (which I love).

I understand the EC Tremolux is based on a 5E3 and the EC Twinolux is on the 5E8-A....but would like to add on the added features of these EC amps.

Any kits or layouts (or mods to kits) out there provide the attenuator and tremolo options/adds? Any advice you could give or share on these versions? Anything negative about these EC amps?

One negative: $$$$$

I recently spoke with CJ at Weber regarding an attenuator for the 5E8-A. He recommended the MiniMass, but as a separate unit, he wasn't fond of the idea of building it into the amp, but of course anyne is free to do whatever they choose.
As far as tremolo I'm sure someone here could recommend something.

How close is the EC Tremolux to the original 5E9 Tremolux or 5G9? These could be the basis of any homebrew tribute