Where do I find brake parts for my Four Winns trailer? This is a 1991 trailer with surge brakes and drums, not electric. See pictures

I expect to have to have the brake drum turned on a lathe and then replace the break shoes and maybe a lot of the hardware inside the drum. I have not removed the hub yet.
What I expect* to do is this: remove the rubber cap, pull the cotter pin, loosen a nut, remove a bearing and slide off the hub.
Any suggestions?
I also expect to have to replace all the break lines.

I expect to have to have the brake drum turned on a lathe and then replace the break shoes and maybe a lot of the hardware inside the drum. I have not removed the hub yet.
What I expect* to do is this: remove the rubber cap, pull the cotter pin, loosen a nut, remove a bearing and slide off the hub.
Any suggestions?
I also expect to have to replace all the break lines.