Where to get GE 1200 silicone/construction adhesive in black?

[Canadian]

I know I can get this from Seastar/H2O. But do any of the stores in Victoria sell GE 1200 construction adhesive in black?

I built my external overflow and then realized that my tube of GE 1200 was over a year expired. Because the overflow is external I'm not willing to chance it and have it fall apart and have my return pump pour water on the floor. So I've resigned myself to cutting apart the overflow and rebuilding it with a new tube of adhesive, but I pick up my tank tonight and I'd like to get the overflow attached to it ASAP so I can start leak testing things and get them set up.