Smoke unit replacement

[KEVINK22]

Hi All, Was just curious if anyone knows if you can replace the sleuth smoke generator that come with all Williams by Bachmann steam engines with a fan driven smoke unit in stead? If so has anyone ever done it, or could recommend a fan driven unit that would work specifically with the J Class 4-8-4 northerns that they offer. Any suggestions, or help would be greatly appreciated. Thanks. -Kevin