If you like his coloring and tail, maybe red junglefowl? The real red junglefowl have a tail sort of like that so this cross should more or less maintain that look. A lot of junglefowl sold are actually mutts selected to have the rough look of a junglefowl. If those work for you, then great, but try to avoid the one with squirrel tails- tail very upright- 90% angle or even leaning towards the back of head. This tail set looks horrible with your rooster;s kind of tail.
Look into smaller Oriental types if you like the tail and would like more upright stance. Asil, smaller shamo. Try to find a black breast red/red duckwing to stay close to his color but wheaten will work as the rooster color is very close however the hens will be more tan/slight brown with black tails. Most orientals have pea comb, which will maintain his head appearence but you will need to be careful to keep rose comb present if you like that walnut comb.
American game- very easy to get red duckwing color pattern, am not sure if you want to deal with the potential aggressiveness/difficulty in handling- roosters will want to fight each other, higher possibility of attacking people, mother hens can be extremely aggressive and hard to handle. Even the little chicks do battles with each other... Not every one can handle that.
other possiblities... d'anvers... they have muff/beard and tail set is rather high but seems the type is pretty close to your bird.
Brown leghorn can work but they can be extremely flighty- this will pass on to the offspring, definitely will throw white earlobes and watch the tail set...
red duckwing modern game bantam can work- they are pretty mellow birds, very small though. they definitely will maintain the general type however they will bring in longer legs and tighter feathers.
