You could also try Jefa.com. They fabricate roller bearings of superior quality, supplying x-yachts, hanse, naiad and so on. They have the measurements for most Bavarias. Just changed mine in my bavaria 32 – cost was app. 160 pounds, and now there is absolutely zero friction in my steering:-) No affiliation…
The ONLY rudder bearing to use that NEVER requires replacement is Vesconite. The Vesconite bearing is self lubricating does not EVER swell and can be manufactured and couriered any where in the world from Vesconite in South Africa.
I battled for two years with stiff rudder. I had it machined with 0.25mm smaller than the original size by vesconite on the inside and outside diameter. The rudder can owe be steered with two fingers. Amazing difference. the site is http://www.vesconite.com. The cost of two bearings and two bottom waters is less than the price from Bavaria.
No affiliation to Vesconite just received really good service.