Blew a brake line, need replacement advice?

Yesterday, the truck blew a brake line after being driven for the first time after the winter. I know the line blew as I've got the evidence all over my driveway.

I'm fairly certain the leak is in the driver to passenger crossover line.

The truck is old, has a fair bit of rust. My question largely centers around whether I can simply replace the broken line. I don't have the time to replace all the lines in the truck unless I can be convinced that it should be a fairly straight-forward endeavor.

Any advice is appreciated, and some guidance on how to go about the repair would be great as well.

Thanks!