I'm the guy with the Bolens Tillmaster. I'm in the rebuild process and have been searching for bearings. So far I've found several but one in particular (Timken 1680) is going to be pricy since it's not a size in general use today. The biggest task was getting the remains of the petrified gear oil out of the gear case. It's like hardened Cosmolene and nothing will dissolve it (including my steam Jenny) so it has to be scraped and wire brushed out. I even bought a rotary shaft tool to get into the nooks and crannies. Very tedious, but the reward will be worth it.
I'm very aware of its rarity so I feel a responsibility to make sure it's properly restored, even down to the actual Timken bearing numbers it was built with. If I ever do decide to sell it I want to make sure it stays in the Bolens community, but I'm not too old to consider it soon.
This afternoon I'm taking the gear case down to the automotive paint dealer so they can use the color analyzer to come up with a color match. I've asked all over the different forums if anyone can identify that metallic looking blue-green color Bolens used in the late fifties but so far no luck.
I'll keep you posted - Bear