Once you have the measurements that will tell you what will work and what won't.
A self serve car wreckers is usually cheap for shift or clutch cable boots, clutch master/slave cylinder boots.
The 12 volt central locking actuator has a boot.
Sometimes you can buy one longer boot and make 4 smaller boots.
Some steering rack boots are tapered down on the tie rod end side so you might be able to cut the smaller end off if you can find one made in this way.
Cutting one end off the boot will give you the right length.as it may be difficult finding one exactly the right size.
