I used to get mine from Westoby's (paint suppliers) on the Boulevard, I haven't used them for a while so I don't know if they still do it, give them a ring first.
The main Calor depot is just at the rear of EYG just off Hessle Road near Gypsyville.
HTH
Paul
------------- "Whether you think you can, or think you can't... You're right"
Katherine, there's a motor supplies type shop in Hedon that we got ours from, very reasonable price. Can't remember name but it's just on the left as you drive past the big Co-op. I'll try and find out the name and post it tomorrow.
------------- May/June - Spring Valley
Aug/Sept - Leekworth