Go here to fix fan low speed.
http://www.supras.com/06/techcenter/...231c19a16cb495
I did this and it lasted for a year. So I went back in and replaced (soldered in place) the low speed wire coil with some small diameter 'stainless steel safety wire' from the local motor cycle shop. (they use it on race/dirt bikes) They will probably give you the 2-3" you need.