Try a local engineering tooling workshop. That's what I did Jambo on my dads recommendation. He works in that industry.
Being in Stranraer means I'm not blessed with engineering options pal Off they go to Mr Mario tomorrow then Cheers guys
I've had it years pal, got from Karndean at the time. The only markings on it is Pat Hayes but that's it. They're roughly 16" blades
Different to that Mario, sounds like the one Dave, I'll try and get a photo the morra. White base, aluminium block posts with a metal loop handle. It has a slot on the white slab with a heavy iron sliding straight/45 stop.