I did a google search for “mg wind wings” and found one E-bay-UK hit for a UK based seller with three pairs available. The same search in E-Bay’s USA site produced nothing.
The UK auction is at
http://cgi.ebay.co.uk/MGTD-MGTF-WIND-WINGS-COMPLETE-WITH-BRA CKETS-BAG_W0QQitemZ310102486783QQcmdZViewItemQQptZUK_CarsPar ts_Vehicles_CarParts_SM?hash=item310102486783&_trksid=p3 286.c0.m14&_trkparms=72%3A1301|66%3A2|65%3A12|39%3A1|240 %3A1318#ShippingPayment
You may have to paste that address back together. I suspect the posting forum software will put in some line breaks.
I also googled “wind wings” or “cobra wind wings”. You’ll find several suppliers. But the Cobra wings are not shaped correctly for our TDs.
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster
If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)