Kubota KX161 Stick Bushings

I went to replace the bushings and pin in the end of the stick today. When I took it apart, the bushings were loose in the bore and just fell out. There is about 1mm of wear in the bore.

I assume that the proper way to fix this would be to have the bore welded and line bored? Does anybody have an idea of what this would cost?

Alternatively, could the bushings just be tack welded in place? The machine just gets occasional use around our farm.

Thanks!