OK, how about taking a stab at it yourself after looking at the available plans on-line (use Google or Duck-duck-go search). Download SCARM (a track planning software for Windows only that's free to use up to 100 pieces of track) and get creative based on other plans you've found. Only you know what equipment you have now and/or plan to acquire, the type of railroad you want to operate, and the amount of money you wish to expend to achieve your goal.
After you do this initial work, many members here will be glad to suggest improvements. Several others that advertise in various locations will be glad to do what you wish above for a professional service charge. Choice is yours; good luck.
Chuck