Jim,
I use Sallco Tools Ltd. They send their stuff to a company in Dorset that deal with their blades. Now, I've just sent off two 48t blades to get sharpened and a few broken teeth replaced. Should be back two weeks. They usually pick up on a Tuesday and return the following Tuesday. I dropped mine off just after the pick had happened :-(
Remind me later and I will let you know my experiences...
I've used Sallco for sorting out and servicing my Makita Drop Saw and they did a good job...
Paul.