Do you prefer standard or aftermarket?
When you say you need all new panels, do you mean yours are damaged or missing?
If you're looking for originals there's probably only two routes repair & respray or buy from Japan. But i have seen Lings listing a new 2J upper for £800

I bought all mine from Japan and it does cost.
Alan at Alkamoto (on eBay) does sell and repair panels.
I had a panel welded at Sudden Impact and they did an excellant job
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