Guys, I've been reading this thread for some days and I am finding it REALLY HARD
to believe the problems you seem to have on getting replacement re-fills.
I have absolutely
NO PROBLEMS getting any number and various sorts of these over here.
If anyone is stuck, I'm more than happy to get some and post them over at my cost price.
Basically, we buy refills in set lengths and then "snap" them off at the required length. You then just cut the rubber to the length you need and slip them in.
Happy to help out anyone in trouble
Ian