Something I came across last night... been looking for it for ages:

Can do these in any size.. silver, gold, white or black
... and reversed for internal application
Prices:
50-60cm wide: £6 - rear windscreen size
40-50cm wide: £5 - front/back window size
30-40cm wide: £4
Below 30cm: £3 - rear quarter window size
+60p postage
PM me!