As hinted in another thread I'm offering up a traditional randonneur's handlebar bag, a Mark's Rack, and a Berthoud Decaleur
1. Loyal Designs traditional randonneur handlebar bag. The main compartment measures ~250mm wide, 180mm tall and 160mm deep. It has a clear map case on top and a handy mesh pocket under the top flap inside. Outside there are five external 3d pockets. Two face the rider, two on the sides, and a big one up front. The bag opens toward the rider. It's grey heavy canvas with leather trim. Loyal Designs is handmade local to me, in Richmond CA. The bag has never had a decaleur installed and looks like it may have been on a bike briefly. The internal stiffeners have gotten a little warped in shipping, but that's easily addressed. This thing is bomber. I'd keep if I didn't already have a Loyal Designs bag. $150 plus shipping.
2. Rivendell/Nitto Mark's Rack M1. A complete Mark's Rack with double struts. It should bolt directly to any front fork that has Rivendell spec mid fork braze ons. If you need to reach lowrider braze ons, you will likely need longer struts. $100 plus shipping
3. Berthoud Decaleur in the longest H-121 variant. This is ideal for a bike with a Nitto stem whose clamp is "pretty darn high" relative to the rack platform, and you don't want to run a skyscraper tall handlebar bag. Pictured on a cockpit that I'm about to disassemble. What you get is just the decaleur. $75 plus shipping.
Buy all three and I'll cover the shipping. I have more photos if you need. Let me know.
Bill Lindsay
El Cerrito, CA