You can get a 22 uf to replace the 20 uf and a 68 uf to replace the 60 uf. A 4.7 uf will work for the 5 uf. You can buy these in individual sections from
www.mouser.com,
www.tubesandmore.com, and
www.justradios.com. The caps should be cheap, under $2 each.