Stepside bumper (rear) replacement needed

Hi everyone,
I'm in Alberta. Great so meet so many people who are lucky enough to drive the best truck on the road.
I have a 2002 step side Tacoma with almost 400,000 kms on it, and I would never part with it. It runs great, I put new rubber and shocks on last year.
The truck has very little rust except for the rear bumper. The first owner drilled a hole in the rear bumper to put in a hitch and it's rusted out badly.
I'd like to replace the bumper myself but first I need the kit and a new(ish) bumper. Wondering how I can go about connecting with someone to find the rare bumper that I need.

thanks!