Hi
Thought I would mention the J Rocket High Top pedal which I bought second hand off Reverb this week. Basically the AC30 Top Boost circuit reduced to a pedal with all tone bass and treble tones behaving like the real thing plus EF86 and speaker emulation for Alnico Blue and Greenbacks.
I have tried it out through my Katana 100 head via return jack (just used power amp section not pre amp).
Was very impressed with sounds and tried the 3 main sounds associated with the Shads, including Burnx nasal sound. The EF 86 sound is slightly fatter and slightly more gain than normal sound and with treble and bass set full anti clockwise you get flat response typical of the normal channel.
The Katana sounded truely like a Vox. I would imagine other amps like Fender would too if they have send returns.
They do not make these any more , but you can get hold of them if you shop around. I got mine for £163 on Reverb, but some are going f9r around £370 .
https://rockettpedals.com/hightop/