I think i made a mess of an earlier reply, so here i go again. As far as i know, all BX parcel-shelf sun-blinds are the same, pullout jobs that clip somewhere in the rooflining area when out. If yours is in good order, let me know how much (including postage to Exeter).
Regards JohnHA.
How does £15 sound including postage all the blinds are ok as is the retraction springs. Postage cost royal mail standard £6.50 they sure know how to charge.