The Dragoon, as you know, is somewhat bigger than 'most' other pistols so you will have to go custom.
Being a tight Scottish-born Brit who makes his own stuff,(if possible), thats what I did for my Walker.
Unfortunately, news of this got out, and now I am approached fairly regularly with, "can you just make me,,,,,,".
It's a good job I'm retired and got some time on my hands 'cos I don't like to disappoint folk if I can help it.