hi steve, i would try to see if you can get new brush holders first, changing the brushes only if badly worn down, when the brushes wear down they get hot and thats what has melted the holders, some times the brushes split too this is from heat,
if you cant get holders try looking round some of the tips some times theres washing machines bumped there that you can get good parts from cheep, moters are very pricy even second hand ones if you can get hold of one, im lucky were i live theres a littel shop who has just about every thing there, so i keep my old tub going on the cheep,
michael thorpe
May 2005