Repair/replace Rim-barrels For 3 Piece Rims?

[made_guy]

I have hairline cracks on the inner edge of ALL 4 of my f*cking rims (take note lovers of of old school rims...) and one repairer has said because they're older jap (volk) rims, they won't weld them - though they said if i take them to someone less 'trustworthy' they might be willing to do it.

So i was wondering, since they're 3 piece rims, can i just replace the barrels and keep the centre hubs? And if so, how expensive would it be if anyone has an idea (that's the part that worries me)?