Not criticizing your choice of tone, but let's look at it logically, in terms of demand and supply.
As a pedal maker, would you sell a product, putting your sweat and your own money into it, that wouldn't even be demanded? In this case, a pedal that resembles a particular amplifier in tonal structure. There are plenty of pedals out there that cater to the Marshall crowd, from a JTM to JCM to a Jubilee to a Plexi, etc etc. Plenty of pedals to fill the gap and why? Because the demand is great enough. This shows why pedals like the BoR REALLY sells. Large demand, large supply.
Now we'll see where there's large demand, limited supply. Pedals that emulate the legendary HiWatt. Not many no? Hence the reason the pedals that do emulate like the BJFe Model H and Catalinbread WIIO is very, very rare and when they are for sale, they are instantly snapped up.
Now we shall see the MG30DFX. Simple low end amp to cater to those who are starting to play guitar, with mediocre sound quality at best. It can sound like heaven to some, hell to others. It's a personal choice nonetheless. The amp is cheap enough to be purchased, light enough to be hauled, and not astounding enough to warren a troop of pedal builders to make a pedal with THAT sound (since it's not a sellable sound, and the amp can be lugged around unlike an AC30) :mrgreen:
So to answer your question, NO there is no pedal that sounds like the amp, but a Marshall emulating drive?
AMT British Sound
BJF Dyna Red
Carl Martin Plexitone
Catalinbread DLS
CMATMODS Brownie
Ed Guidry's BSIAB II
Electro Harmonix English Muff'n
Emma ReezaFratzitz
Fulltone OCD
GeekMacDaddy British Ball Breaker
Greer Amplification Sucker Punch
HAO Rust Driver
Himmelstrutz Fetto
Indyguitarist Plexi-Drive
Indyguitarist Plextortion
Jetter Gain Stage Black
Jetter Gain Stage Blue
Jetter Gain Stage Purple
Kaden Brown Creeper
Line 6 Crunchtone
Lovekraft Mojodrive
Lovepedal COT 50
Lovepedal Purple Plexi 100
Lovepedal Purple Plexi 800
M.A.D. Cold Gin
Marshall Bluesbreaker Mark I
Marshall Guvnor
Menatone Foxy Brown
Menatone King of the Britains
Menatone Working Man’s Blue
MI Audio Crunch Box
OLC Eighteen
OLC Thor
OLC Thunderchief
Snarling Dogs Black Dog
Tech21 SansAmp British (w built in cab simulation, not meant to be used with amp)
Toadworks Death Rattle
Toadworks Mr. Ed
Tonebone Hot British
V-Stack Classic
Xactone Atomic Overdrive
Zvex Box of Rock
Here's an incomplete list I found online. Hope it helps!