What I did as far as a bit was to go through many buckets of old rusted bits and found a hang forged loose ring snaffle. I took it home and took it to the grinding wheel to remove the rust, and it looks great. Cost me like $2. Any cavalry curb I found my horse absolutely turned up his nose at, all very harsh bits compared to what my horses are used to, and I wasn't going to pay over $200 to have Myler make me one. So I did some studying and found that loose ring snaffles were often used as well at the curbs. so it might be another option for you. Something you can try as far as a bridle goes is to get a good photo or something of the sort and take it to a leather crafter. Hardware shouldn't be too hard to come by, and the stitching on the bridle is fairly simple. I'm lucky to have my favorite tack shop that can make me anything, and my captain also makes most of the leather accouterments for our regiment.
"Time To reload"
7th IND/ 1st VIR Cavalry
"Are you gonna pull those pistols or whistle Dixie?" Josey Wales
"I've simply been brought up being knocked down" Buster Keaton