OP asked for a cheapo mod. The cheapest mod would be to pot the pickup to deal with the microphonics then have the coils attached in parallel rather than series. In series, a mudbucker has a DC resitance of 30 k ohms. Rewire the coils in parallel and you are down to 7.5 k ohms. Caveats ahoy; DC resitance tells you nothing/very little/only a rough estimate (delete according to your personal opinion) on the tone of the pickup. However you will be shifting the resonant peak of the pickup allowing more treble content to shine through. It may even sound a teensy weensy little tiny bit more like a P bass, and less like Jack Bruce. Contrary to popular opinion (on Harmony Central and all the 'shredder' forums at least), humbuckers with the coils in parallel still produce a sound. I took two Artec hotrails pickups and rewired them with the coils in parallel. These pickups had a DC resistance of ~12 k ohms, and now have a resistance of 3 k ohms post mods. They still sound exactly like a pickup should. They aren't weak, thin or tinny. Even better, they no longer have the obnoxious 'cocked wah' Boston/Michael Schenker tone that they had when the coils were wired in series. I mounted these pickups in an electric mandolin, as the stock Strat pickups were horribly noisy and imbalanced over the string courses.
Now if Epiphone are not sticking 30 k ohm sidewinder replicas in their EB-0s then a lot of that will not apply.
A Curtis Novak mudbucker may well cost more than your Epiphone, but it would be the final word in terms of a Mudbucker repro, and of course he is flexible enough to put a different pickup under that cover if you desire.
The cheapest option is those pesky Artec mudbuckers that ship from China, cheapo style. Out the box you may find the coils mis-wired and/or the magnets attached incorrectly. Even when they are fixed up they are still microphonic and lack balance between strings. Good luck!
Dimarzio Model One. The oldschool '70s mod. Takes you back to 1976!!! Visually obviously different from the stock pickup. Interesting wiring options available. The DC rating is about 1/3 of an original Gibson sidewinder, but still punishingly hot at 11k. Mount this down at the end of the neck on your EB-0 and it will still be muddy, but with more treble a Gibson unit.
