How about an angular contact bearing?
FAG, (no I ‘aint got shares!), do one that is 35 x 47 x 7 (No. 71807-B-TVH). I know it looks on the light side but surely in this application it’d do? On the up side there is no grinding required just sleeves to be made. FAG do another in the same range with a 55mm O.D. that can be had with seals and if memory serves the outer ring will pop off so holding for grinding and cleaning grinding debris off afterwards would be no problem but the question is could it stand 1mm/side off?
On balance I think I’d go with the smaller size and look how much weight you’ll be saving! . . .
