I think there was a thread about this a while back but I didn't know they made a snow cab for the small frames. I have a few of the sales brochures and there's no mention of it.
1969 simplicity broadmoor 728 - $400 (Hatboro)
1969 simplicity broadmoor 728 8hp motor runs awesome. Comes with snow thrower, mower deck, plow, lawn roller, snow thrower cab, tire chains, wheel weights, rear weights, and owner manual. Email me and I will respond looking to get $400 for all of it