Get yer New rear fender panels here...
 

Several threads asking for leads to decent replacement panels for SA-FB rear lower fenders, lips, etc.
(Disclaimer: not my products -but am happy customer)

http://www.ebay.com/itm/MAZDA-RX7-MK1-REAR-REPAIR-PANEL-FENDER-SA-FB-/230959356140?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item35c64018ec
Yes - its in the UK
No - you do NOT have to buy ALL the pieces.

Steve was great and the pieces are great quality and fit. I bought the rear lowers for each side of my SA.

Stu Aull
80GS
Alaska

is it silly for me to buy some of these to stick in a closet for a rainy day? haha

thanks for the link!

Not at all. I did!
;)
Stu Aull
80GS
Alaska