Try this web sight. He had a .36 for $600. The action is not a hopkins and allen but it looks much better. A plus is the interchangeable barrels.
[url] http://www.lx.net/wadeingrham/muzzlelo.htm[/quote][/url]
The old H&A actions like mine do have interchangable barrels. Mine is the style with a drift pin holding the barrel in place. I think the later copies like Deer Creek use a screw. H&A advetised additional barrels back then, asking you to send in the receiver for fitting. If you can find one of these in any caliber, you can have a barrel fitted to your action or do it yourself.
There was also a post here about a month back which showed a very simple U/H design.
I looked for a .36 barrel yesterday at GM's site but they no longer list it. Checked Natches and MidSouth on the off chance of finding one, but no luck. Now I'm considering making a .36 for my H&A which must be the target model as the barrel is about 1" round and weighs a ton.
RedFeather