250 1988 yz250 build

Alright ordered the new clutch cable. Now for the final thing to buy... The rear panels. I still can't find some for the bike but I did find some UFO plastics made for a 1989-1990 yz250. They seem to match up just like mine except that it doesn't include the piece that seals the air box. Should I buy? And what do I do about the air box?
 
Alright ordered the new clutch cable. Now for the final thing to buy... The rear panels. I still can't find some for the bike but I did find some UFO plastics made for a 1989-1990 yz250. They seem to match up just like mine except that it doesn't include the piece that seals the air box. Should I buy? And what do I do about the air box?


No. They will not fit.
 
On both of these 1988 yz250s it seems they also put the 89-90 side panels on and put some kind of black cover over the air box. Anyone know where I can get that cover or what it's called?

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