I've looked at dozens of compatibility charts on the 'Net but can't get a definitive answer on this.
There is a snowthrower for sale locally, serial number M03251X.... I assume this is a model 3251 blower. Guy says its 42". My LX-188 calls for a 3252 blower. I can't find any useful information on a 3251 blower at all. It's complete, a little beat up, but only $150. I'm tempted to snag it just because it's cheap.