rebuild

I am new here first time posting on any online forum, thanks for having me. This is what brings me here, I am looking for piston and cylinder for a super 380 if anyone can point me in the right direction that would be very much appreciated. I would also like to hear some ideas and ways I can get...

I have a 281xp which I love but was having issues running as of late. Removed top end and piston has some decent scoring. Should I replace the piston and cylinder with oem or should I go for a larger piston and cylinder?