This man speaks the truth.Gen 4 and Gen 5 use same fuel tank so can use either
I also ordered mines from them....I think...or Profibre..I know it was a Czech Company....like $172 I think shipped to USA. took about 2 weeks or so...I ordered mine from sebimoto in Czech Republic. I think that's where I ordered the one for my gen 4 and it fit ok. You can get them sent in a colour which will help avoid having to send it out for paint. I'll know how good it is in a day or two when it arrives.