Hi Jonno,
Good question!
I had the same problem when I did my car and just prepsoled the originals.
It would be possible to get some rubber from Clark Rubber or similar, cut it to shape using an original as a template, and then shape it with a heat gun. The trick is the angled pressing at the top where it is wedged into the lower rear 1/4.
Maybe a piece could be glued to replicate this?
It really is about time that the clubs put their heads together on reproducing some of these things. Anything is possible, you just need the volume to make it worthwhile.
Check out the remade stuff that available for XU1's and GT Falcons. HEAPS less of them around, but an amazing quantity of excellent quality repro stuff. And at reasonable prices.
The days of relying on the excellent work of Les and the guys at Rares are surely coming to a close as volume declines. Ok they'll continue to do the most popular stuff, things that make true
commercial sense. But Les has overheads that the clubs don't so clubs remanufacturing a more varied range becomes more viable. Go on to the web and check out the breadth of low cost manufacturers in China.
http://www.manufacturers.com.tw/search_keyword.php?lang=en&st=1&sk=rubberhttp://tinyurl.com/gkfrvhttp://www.china-manufacturer-directory.com/china-6123/auto-parts-rubber-parts.htmlCome on you clubbies, get organised and make some repro stuff.
There are two of these rubber 'flaps' on every FE and FC - the clubs have what, maybe 300 cars in them, possibly more. That means there's a potential market of at least 600 of these units.
Cheers,
Craig.