Bulova 1975 Accutron

Does anyone know where I could find a reasonably priced donor Accutron 221 movement?  I purchased a small lot of watches in an online auction.  In the lot was a Bulova Accutron.  When I received it and opened the case, I found the battery had leaked badly and the movement is enveloped in crust.  Markings on the movement are obscured.  I can make out an N5 and maybe 2210.  The inside case back mentions Accutron 221 and the case is marked N4.