Stanley makes a flat bottom spokeshave (IIRC model 12-951). It's inexpensive and resembles the #151 but I'm told the bed casting is typically painted and rough making the tool perform poorly. Is this a tool I could tune up without too much trouble? File the bed flat, lap the sole, sharpen the blade and put it to work? Kuntz makes a similar spokeshave that costs more and might be made a little better but would still take some fettling.
I've been looking at vintage #151 spokehaves as well but $30 - $50 for an user tool that probably needs at least as much work seems high to me.
Can anyone point me toward more info on cleaning up and tuning a spoke shave.