Lots of panels up on eBay. Arches, sills, rear vallences.
Can't link as im on me phone.

http://www.ebay.co.uk/itm/VOLVO-340-360 ... 256c9bf91e

http://www.ebay.co.uk/itm/VOLVO-340-360 ... 20c3b3b1bb

http://www.ebay.co.uk/itm/VOLVO-340-360 ... 5892d0178e

Door
http://www.ebay.co.uk/itm/CLASSIC-VOLVO ... 56491e1a78

Rear corner
http://www.ebay.co.uk/itm/VOLVO-340-360 ... 5892d017d3

Scuttle
http://www.ebay.co.uk/itm/VOLVO-340-360 ... 5892d0179a

Fuel tank
http://www.ebay.co.uk/itm/VOLVO-340-360 ... 20c3b3b141

Tailgate
http://www.ebay.co.uk/itm/VOLVO-340-360 ... 589251ae3e

Rear door
http://www.ebay.co.uk/itm/VOLVO-340-360 ... 256c9be2f1

Ledge. Cheers dude.