Replace application from computer with cpu SPARC 64b to computer with cpu Intel 64b

I have application compiled on server with Solaris 8 and CPU UltraSPARC-III+ x64b and need replace it (due to server end of life) to another new machine with CPU INTEL 64b , its may be same OS or better to new version of Solaris or best variant to RedHat 6(7), I don't have a source. Our application is a network application compiled to SunOS 5.8 on sever with CPU UltraSPARC-III+ x64b but this server can down every second. My idea is open new VM with SunOS 5.8 and replace application to this new server. But I need help how best way to do it (the way I understand it is that I can open new server with CentOS 7, and on this server run QEMU with simulation of this architecture and OS), or whether there are other solution to this problem. Upd: I need install SunOS 5.8 with emulation of CPU - UltraSPARC-III+ x64b on server with CPU - Intel 64bit (Xeon(R) CPU E5-2650 v4) to production application (that need to run nonstop) , and question if/what solution for this problem ?