Switches are not listed by the radius of the curved portion (possible exception-curved turnouts where both routes curve), but they are given a number based on the angle of the frog, ie #4, #6, #8, #10, etc. The only turnouts offered as "remote" ( I presume you mean with switch motors powered by a remote electrical switch) are the Atlas Snap switches and probably similar ones from other manufacturers. The Atlas Snap switches are @ a #4.5 that is slightly larger radius than a #4. You can get Atlas Customline switches in #4.5, #6, & #8 I think. The reason they don't include a switch machine with them is that modelers would rather buy them without the switch machine and use what ever their favorite type of switch machine would be. Some modelers like to use automotive style choke cables with a bell crank to operate switches manually from the fascia. Others like Tortoise slow motion switch machines. Some like twin coil machines like the Atlas snap switch has but made to mount under the table and operate the switch through a hole under the switch out of sight. Some modelers use Caboose Hobbies manual ground throws to operate turnouts, and some prefer the turnouts made by Peco that have an internal over center spring, so the turnout can be thrown by hand and the spring will hold it in whichever position it is thrown to. By the way, Peco switches are not listed by #s they are small medium and large, which I think correspond to #4, #6, & #8 but I'm not sure.